diff --git a/app/code/core/Mage/Checkout/controllers/CartController.php b/app/code/core/Mage/Checkout/controllers/CartController.php
index 520f1fcb5b7..7f022660556 100644
--- a/app/code/core/Mage/Checkout/controllers/CartController.php
+++ b/app/code/core/Mage/Checkout/controllers/CartController.php
@@ -680,7 +680,7 @@ public function ajaxUpdateAction()
                 if ($qty == 0) {
                     $cart->removeItem($id);
                 } else {
-                    $quoteItem->setQty($qty)->save();
+                    $quoteItem->setQty($qty);
                 }
                 $this->_getCart()->save();
 
diff --git a/app/code/core/Mage/Customer/Model/Resource/Customer.php b/app/code/core/Mage/Customer/Model/Resource/Customer.php
index 3add2717676..a3fd745101a 100644
--- a/app/code/core/Mage/Customer/Model/Resource/Customer.php
+++ b/app/code/core/Mage/Customer/Model/Resource/Customer.php
@@ -381,4 +381,19 @@ public function getPasswordTimestamp($customerId)
         }
         return $value;
     }
+
+    /**
+     * Get email by customer ID.
+     *
+     * @param int $customerId
+     * @return string|false
+     */
+    public function getEmail($customerId)
+    {
+        $select = $this->_getReadAdapter()->select()
+            ->from($this->getEntityTable(), 'email')
+            ->where('entity_id = ?', $customerId);
+
+        return $this->_getReadAdapter()->fetchOne($select);
+    }
 }
diff --git a/app/code/core/Mage/Eav/Model/Attribute/Data/Date.php b/app/code/core/Mage/Eav/Model/Attribute/Data/Date.php
index 0da6a865ae9..9e6d5f3d3fe 100644
--- a/app/code/core/Mage/Eav/Model/Attribute/Data/Date.php
+++ b/app/code/core/Mage/Eav/Model/Attribute/Data/Date.php
@@ -25,12 +25,12 @@ class Mage_Eav_Model_Attribute_Data_Date extends Mage_Eav_Model_Attribute_Data_A
      * Extract data from request and return value
      *
      * @param Zend_Controller_Request_Http $request
-     * @return array|string
+     * @return array|string|false
      */
     public function extractValue(Zend_Controller_Request_Http $request)
     {
         $value = $this->_getRequestValue($request);
-        return $this->_applyInputFilter($value);
+        return $value ? $this->_applyInputFilter($value) : false;
     }
 
     /**
diff --git a/app/code/core/Mage/GoogleAnalytics/Block/Ga.php b/app/code/core/Mage/GoogleAnalytics/Block/Ga.php
index b706fd83b53..01d210f0d17 100644
--- a/app/code/core/Mage/GoogleAnalytics/Block/Ga.php
+++ b/app/code/core/Mage/GoogleAnalytics/Block/Ga.php
@@ -131,36 +131,32 @@ protected function _getEnhancedEcommerceDataForAnalytics4()
         $request = $this->getRequest();
         $moduleName = $request->getModuleName();
         $controllerName = $request->getControllerName();
+        $helper = Mage::helper('googleanalytics');
 
         /**
          * This event signifies that an item was removed from a cart.
          *
          * @link https://developers.google.com/tag-platform/gtagjs/reference/events#remove_from_cart
          */
-        $removedProducts = Mage::getSingleton('core/session')->getRemovedProductsCart();
+        $removedProducts = Mage::getSingleton('core/session')->getRemovedProductsForAnalytics();
         if ($removedProducts) {
             foreach ($removedProducts as $removedProduct) {
-                $_removedProduct = Mage::getModel('catalog/product')->load($removedProduct);
                 $eventData = [];
                 $eventData['currency'] = Mage::app()->getStore()->getCurrentCurrencyCode();
-                $eventData['value'] = number_format($_removedProduct->getFinalPrice(), 2, '.', '');
+                $eventData['value'] = $helper->formatPrice($removedProduct['price'] * $removedProduct['qty']);
                 $eventData['items'] = [];
                 $_item = [
-                    'item_id' => $_removedProduct->getSku(),
-                    'item_name' => $_removedProduct->getName(),
-                    'price' => number_format($_removedProduct->getFinalPrice(), 2, '.', ''),
+                    'item_id' => $removedProduct['sku'],
+                    'item_name' => $removedProduct['name'],
+                    'price' => $helper->formatPrice($removedProduct['price']),
+                    'quantity' => (int) $removedProduct['qty'],
+                    'item_brand' => $removedProduct['manufacturer'],
+                    'item_category' => $removedProduct['category'],
                 ];
-                if ($_removedProduct->getAttributeText('manufacturer')) {
-                    $_item['item_brand'] = $_removedProduct->getAttributeText('manufacturer');
-                }
-                $itemCategory = Mage::helper('googleanalytics')->getLastCategoryName($_removedProduct);
-                if ($itemCategory) {
-                    $_item['item_category'] = $itemCategory;
-                }
-                array_push($eventData['items'], $_item);
+                $eventData['items'][] = $_item;
                 $result[] = "gtag('event', 'remove_from_cart', " . json_encode($eventData, JSON_THROW_ON_ERROR) . ");";
             }
-            Mage::getSingleton('core/session')->unsRemovedProductsCart();
+            Mage::getSingleton('core/session')->unsRemovedProductsForAnalytics();
         }
 
         /**
@@ -168,30 +164,24 @@ protected function _getEnhancedEcommerceDataForAnalytics4()
          *
          * @link https://developers.google.com/tag-platform/gtagjs/reference/events#add_to_cart
          */
-        $addedProducts = Mage::getSingleton('core/session')->getAddedProductsCart();
+        $addedProducts = Mage::getSingleton('core/session')->getAddedProductsForAnalytics();
         if ($addedProducts) {
-            foreach ($addedProducts as $addedProduct) {
-                $_addedProduct = Mage::getModel('catalog/product')->load($addedProduct);
+            foreach ($addedProducts as $_addedProduct) {
                 $eventData = [];
                 $eventData['currency'] = Mage::app()->getStore()->getCurrentCurrencyCode();
-                $eventData['value'] = number_format($_addedProduct->getFinalPrice(), 2, '.', '');
+                $eventData['value'] = $helper->formatPrice($_addedProduct['price'] * $_addedProduct['qty']);
                 $eventData['items'] = [];
                 $_item = [
-                    'item_id' => $_addedProduct->getSku(),
-                    'item_name' => $_addedProduct->getName(),
-                    'price' => number_format($_addedProduct->getFinalPrice(), 2, '.', ''),
+                    'item_id' => $_addedProduct['sku'],
+                    'item_name' => $_addedProduct['name'],
+                    'price' => $helper->formatPrice($_addedProduct['price']),
+                    'quantity' => (int) $_addedProduct['qty'],
+                    'item_brand' => $_addedProduct['manufacturer'],
+                    'item_category' => $_addedProduct['category'],
                 ];
-                if ($_addedProduct->getAttributeText('manufacturer')) {
-                    $_item['item_brand'] = $_addedProduct->getAttributeText('manufacturer');
-                }
-
-                $itemCategory = Mage::helper('googleanalytics')->getLastCategoryName($_addedProduct);
-                if ($itemCategory) {
-                    $_item['item_category'] = $itemCategory;
-                }
-                array_push($eventData['items'], $_item);
+                $eventData['items'][] = $_item;
                 $result[] = "gtag('event', 'add_to_cart', " . json_encode($eventData, JSON_THROW_ON_ERROR) . ");";
-                Mage::getSingleton('core/session')->unsAddedProductsCart();
+                Mage::getSingleton('core/session')->unsAddedProductsForAnalytics();
             }
         }
 
@@ -205,14 +195,14 @@ protected function _getEnhancedEcommerceDataForAnalytics4()
             $category = Mage::registry('current_category') ? Mage::registry('current_category')->getName() : false;
             $eventData = [];
             $eventData['currency'] = Mage::app()->getStore()->getCurrentCurrencyCode();
-            $eventData['value'] = number_format($productViewed->getFinalPrice(), 2, '.', '');
+            $eventData['value'] = $helper->formatPrice($productViewed->getFinalPrice());
             $eventData['items'] = [];
             $_item = [
                 'item_id' => $productViewed->getSku(),
                 'item_name' => $productViewed->getName(),
                 'list_name' => 'Product Detail Page',
                 'item_category' => $category,
-                'price' => number_format($productViewed->getFinalPrice(), 2, '.', ''),
+                'price' => $helper->formatPrice($productViewed->getFinalPrice()),
             ];
             if ($productViewed->getAttributeText('manufacturer')) {
                 $_item['item_brand'] = $productViewed->getAttributeText('manufacturer');
@@ -251,7 +241,7 @@ protected function _getEnhancedEcommerceDataForAnalytics4()
                     'item_id' => $productViewed->getSku(),
                     'index' => $index,
                     'item_name' => $productViewed->getName(),
-                    'price' => number_format($productViewed->getFinalPrice(), 2, '.', ''),
+                    'price' => $helper->formatPrice($productViewed->getFinalPrice()),
                 ];
                 if ($productViewed->getAttributeText('manufacturer')) {
                     $_item['item_brand'] = $productViewed->getAttributeText('manufacturer');
@@ -263,7 +253,7 @@ protected function _getEnhancedEcommerceDataForAnalytics4()
                 $index++;
                 $eventData['value'] += $productViewed->getFinalPrice();
             }
-            $eventData['value'] = number_format($eventData['value'], 2, '.', '');
+            $eventData['value'] = $helper->formatPrice($eventData['value']);
             $result[] = "gtag('event', 'view_item_list', " . json_encode($eventData, JSON_THROW_ON_ERROR) . ");";
         }
 
@@ -273,32 +263,34 @@ protected function _getEnhancedEcommerceDataForAnalytics4()
          * @link https://developers.google.com/tag-platform/gtagjs/reference/events#view_cart
          */
         elseif ($moduleName == 'checkout' && $controllerName == 'cart') {
-            $productCollection = Mage::getSingleton('checkout/session')->getQuote()->getAllVisibleItems();
+            $productCollection = Mage::getSingleton('checkout/session')->getQuote()->getAllItems();
             $eventData = [];
             $eventData['currency'] = Mage::app()->getStore()->getCurrentCurrencyCode();
             $eventData['value'] = 0.00;
             $eventData['items'] = [];
 
             foreach ($productCollection as $productInCart) {
-                $_product = Mage::getModel('catalog/product')->load($productInCart->getProductId());
+                if ($productInCart->getParentItem()) {
+                    continue;
+                }
+                $_product = $productInCart->getProduct();
                 $_item = [
                     'item_id' => $_product->getSku(),
                     'item_name' => $_product->getName(),
-                    'price' => number_format($_product->getFinalPrice(), 2, '.', ''),
+                    'price' => $helper->formatPrice($_product->getFinalPrice()),
                     'quantity' => (int) $productInCart->getQty(),
                 ];
                 if ($_product->getAttributeText('manufacturer')) {
                     $_item['item_brand'] = $_product->getAttributeText('manufacturer');
                 }
-
-                $itemCategory = Mage::helper('googleanalytics')->getLastCategoryName($_product);
+                $itemCategory = $helper->getLastCategoryName($_product);
                 if ($itemCategory) {
                     $_item['item_category'] = $itemCategory;
                 }
                 array_push($eventData['items'], $_item);
-                $eventData['value'] += $_product->getFinalPrice();
+                $eventData['value'] += $_product->getFinalPrice() * $productInCart->getQty();
             }
-            $eventData['value'] = number_format($eventData['value'], 2, '.', '');
+            $eventData['value'] = $helper->formatPrice($eventData['value']);
             $result[] = "gtag('event', 'view_cart', " . json_encode($eventData, JSON_THROW_ON_ERROR) . ");";
         }
 
@@ -308,32 +300,34 @@ protected function _getEnhancedEcommerceDataForAnalytics4()
          * @link https://developers.google.com/tag-platform/gtagjs/reference/events#begin_checkout
          */
         elseif ($moduleName == static::CHECKOUT_MODULE_NAME && $controllerName == static::CHECKOUT_CONTROLLER_NAME) {
-            $productCollection = Mage::getSingleton('checkout/session')->getQuote()->getAllVisibleItems();
+            $productCollection = Mage::getSingleton('checkout/session')->getQuote()->getAllItems();
             if ($productCollection) {
                 $eventData = [];
                 $eventData['currency'] = Mage::app()->getStore()->getCurrentCurrencyCode();
                 $eventData['value'] = 0.00;
                 $eventData['items'] = [];
                 foreach ($productCollection as $productInCart) {
-                    $_product = Mage::getModel('catalog/product')->load($productInCart->getProductId());
+                    if ($productInCart->getParentItem()) {
+                        continue;
+                    }
+                    $_product = $productInCart->getProduct();
                     $_item = [
                         'item_id' => $_product->getSku(),
                         'item_name' => $_product->getName(),
-                        'price' => number_format($_product->getFinalPrice(), 2, '.', ''),
+                        'price' => $helper->formatPrice($_product->getFinalPrice()),
                         'quantity' => (int) $productInCart->getQty(),
                     ];
                     if ($_product->getAttributeText('manufacturer')) {
                         $_item['item_brand'] = $_product->getAttributeText('manufacturer');
                     }
-
-                    $itemCategory = Mage::helper('googleanalytics')->getLastCategoryName($_product);
+                    $itemCategory = $helper->getLastCategoryName($_product);
                     if ($itemCategory) {
                         $_item['item_category'] = $itemCategory;
                     }
                     array_push($eventData['items'], $_item);
                     $eventData['value'] += $_product->getFinalPrice();
                 }
-                $eventData['value'] = number_format($eventData['value'], 2, '.', '');
+                $eventData['value'] = $helper->formatPrice($eventData['value']);
                 $result[] = "gtag('event', 'begin_checkout', " . json_encode($eventData, JSON_THROW_ON_ERROR) . ");";
             }
         }
@@ -352,28 +346,30 @@ protected function _getEnhancedEcommerceDataForAnalytics4()
                 $orderData = [
                     'currency' => $order->getBaseCurrencyCode(),
                     'transaction_id' => $order->getIncrementId(),
-                    'value' => number_format($order->getBaseGrandTotal(), 2, '.', ''),
-                    'coupon' => strtoupper($order->getCouponCode()),
-                    'shipping' => number_format($order->getBaseShippingAmount(), 2, '.', ''),
-                    'tax' => number_format($order->getBaseTaxAmount(), 2, '.', ''),
+                    'value' => $helper->formatPrice($order->getBaseGrandTotal()),
+                    'coupon' => strtoupper((string)$order->getCouponCode()),
+                    'shipping' => $helper->formatPrice($order->getBaseShippingAmount()),
+                    'tax' => $helper->formatPrice($order->getBaseTaxAmount()),
                     'items' => []
                 ];
 
                 /** @var Mage_Sales_Model_Order_Item $item */
-                foreach ($order->getAllVisibleItems() as $item) {
+                foreach ($order->getAllItems() as $item) {
+                    if ($item->getParentItem()) {
+                        continue;
+                    }
+                    $_product = $item->getProduct();
                     $_item = [
                         'item_id' => $item->getSku(),
                         'item_name' => $item->getName(),
                         'quantity' => (int) $item->getQtyOrdered(),
-                        'price' => number_format($item->getBasePrice(), 2, '.', ''),
-                        'discount' => number_format($item->getBaseDiscountAmount(), 2, '.', '')
+                        'price' => $helper->formatPrice($item->getBasePrice()),
+                        'discount' => $helper->formatPrice($item->getBaseDiscountAmount())
                     ];
-                    $_product = Mage::getModel('catalog/product')->load($item->getProductId());
                     if ($_product->getAttributeText('manufacturer')) {
                         $_item['item_brand'] = $_product->getAttributeText('manufacturer');
                     }
-
-                    $itemCategory = Mage::helper('googleanalytics')->getLastCategoryName($_product);
+                    $itemCategory = $helper->getLastCategoryName($_product);
                     if ($itemCategory) {
                         $_item['item_category'] = $itemCategory;
                     }
diff --git a/app/code/core/Mage/GoogleAnalytics/Helper/Data.php b/app/code/core/Mage/GoogleAnalytics/Helper/Data.php
index 49b4b098987..5079f00e022 100644
--- a/app/code/core/Mage/GoogleAnalytics/Helper/Data.php
+++ b/app/code/core/Mage/GoogleAnalytics/Helper/Data.php
@@ -184,4 +184,13 @@ public function getLastCategoryName($product): string
         }
         return '';
     }
+
+    /**
+     * @param int|float|string $price
+     * @return string
+     */
+    public function formatPrice($price): string
+    {
+        return number_format($price, 2, '.', '');
+    }
 }
diff --git a/app/code/core/Mage/GoogleAnalytics/Model/Observer.php b/app/code/core/Mage/GoogleAnalytics/Model/Observer.php
index 728a0ae2fe6..411b6941ee6 100644
--- a/app/code/core/Mage/GoogleAnalytics/Model/Observer.php
+++ b/app/code/core/Mage/GoogleAnalytics/Model/Observer.php
@@ -39,38 +39,65 @@ public function setGoogleAnalyticsOnOrderSuccessPageView(Varien_Event_Observer $
     }
 
     /**
-     * Add 'removed item' from cart into session for GA4 block to render event on cart view
-     *
+     * Process items added or removed from cart for GA4 block to render event on cart view
      * @param Varien_Event_Observer $observer
+     * @return void
      */
-    public function removeItemFromCartGoogleAnalytics(Varien_Event_Observer $observer)
+    public function processItemsAddedOrRemovedFromCart(Varien_Event_Observer $observer): void
     {
-        $productRemoved = $observer->getEvent()->getQuoteItem()->getProduct();
-        if ($productRemoved) {
-            $_removedProducts = Mage::getSingleton('core/session')->getRemovedProductsCart() ?: [];
-            $_removedProducts[] = $productRemoved->getId();
-            $_removedProducts = array_unique($_removedProducts);
-            Mage::getSingleton('core/session')->setRemovedProductsCart($_removedProducts);
+        /** @var Mage_Sales_Model_Quote_Item $item */
+        $item = $observer->getEvent()->getItem();
+        if ($item->getParentItem()) {
+            return;
         }
-    }
 
-    /**
-     * Add 'added item' to cart into session for GA4 block to render event on cart view
-     *
-     * @param Varien_Event_Observer $observer
-     */
-    public function addItemToCartGoogleAnalytics(Varien_Event_Observer $observer)
-    {
-        $productAdded = $observer->getEvent()->getQuoteItem()->getProduct();
-        if ($productAdded) {
-            // Fix double add to cart for configurable products, skip child product
-            if ($productAdded->getParentProductId()) {
-                return;
+        // avoid to process the same quote_item more than once
+        // this could happen in case of double save of the same quote_item
+        $processedProductsRegistry = Mage::registry('processed_quote_items_for_analytics') ?? new ArrayObject();
+        if ($processedProductsRegistry->offsetExists($item->getId())) {
+            return;
+        }
+        $processedProductsRegistry[$item->getId()] = true;
+        Mage::register('processed_quote_items_for_analytics', $processedProductsRegistry, true);
+
+        $addedQty = 0;
+        $removedQty = 0;
+        if ($item->isObjectNew()) {
+            $addedQty = $item->getQty();
+        } elseif ($item->isDeleted()) {
+            $removedQty = $item->getQty();
+        } elseif ($item->hasDataChanges()) {
+            $newQty = $item->getQty();
+            $oldQty = $item->getOrigData('qty');
+            if ($newQty > $oldQty) {
+                $addedQty = $newQty - $oldQty;
+            } elseif ($newQty < $oldQty) {
+                $removedQty = $oldQty - $newQty;
+            }
+        }
+
+        if ($addedQty || $removedQty) {
+            $product = $item->getProduct();
+            $dataForAnalytics = [
+                'id' => $product->getId(),
+                'sku' => $product->getSku(),
+                'name' => $product->getName(),
+                'qty' => $addedQty ?: $removedQty,
+                'price' => $product->getFinalPrice(),
+                'manufacturer' => $product->getAttributeText('manufacturer') ?: '',
+                'category' => Mage::helper('googleanalytics')->getLastCategoryName($product)
+            ];
+
+            $session = Mage::getSingleton('core/session');
+            if ($addedQty) {
+                $addedProducts = $session->getAddedProductsForAnalytics() ?: [];
+                $addedProducts[] = $dataForAnalytics;
+                $session->setAddedProductsForAnalytics($addedProducts);
+            } else {
+                $removedProducts = $session->getRemovedProductsForAnalytics() ?: [];
+                $removedProducts[] = $dataForAnalytics;
+                $session->setRemovedProductsForAnalytics($removedProducts);
             }
-            $_addedProducts = Mage::getSingleton('core/session')->getAddedProductsCart() ?: [];
-            $_addedProducts[] = $productAdded->getParentItem() ? $productAdded->getParentItem()->getId() : $productAdded->getId();
-            $_addedProducts = array_unique($_addedProducts);
-            Mage::getSingleton('core/session')->setAddedProductsCart($_addedProducts);
         }
     }
 }
diff --git a/app/code/core/Mage/GoogleAnalytics/etc/config.xml b/app/code/core/Mage/GoogleAnalytics/etc/config.xml
index 8f7750a93b9..d4e605dde6e 100644
--- a/app/code/core/Mage/GoogleAnalytics/etc/config.xml
+++ b/app/code/core/Mage/GoogleAnalytics/etc/config.xml
@@ -72,22 +72,22 @@
                     </googleanalytics_order_success>
                 </observers>
             </checkout_multishipping_controller_success_action>
-            <sales_quote_remove_item>
+            <sales_quote_item_save_after>
                 <observers>
-                    <googleanalytics_remove_item>
+                    <mage_googleanalytics>
                         <class>googleanalytics/observer</class>
-                        <method>removeItemFromCartGoogleAnalytics</method>
-                    </googleanalytics_remove_item>
+                        <method>processItemsAddedOrRemovedFromCart</method>
+                    </mage_googleanalytics>
                 </observers>
-            </sales_quote_remove_item>
-            <sales_quote_add_item>
+            </sales_quote_item_save_after>
+            <sales_quote_item_delete_after>
                 <observers>
-                    <googleanalytics_add_item>
+                    <mage_googleanalytics>
                         <class>googleanalytics/observer</class>
-                        <method>addItemToCartGoogleAnalytics</method>
-                    </googleanalytics_add_item>
+                        <method>processItemsAddedOrRemovedFromCart</method>
+                    </mage_googleanalytics>
                 </observers>
-            </sales_quote_add_item>
+            </sales_quote_item_delete_after>
         </events>
         <layout>
             <updates>
diff --git a/app/code/core/Mage/Reports/etc/config.xml b/app/code/core/Mage/Reports/etc/config.xml
index d07b18a00a3..c3de0daf8a2 100644
--- a/app/code/core/Mage/Reports/etc/config.xml
+++ b/app/code/core/Mage/Reports/etc/config.xml
@@ -199,13 +199,16 @@
                 <ytd_start>1,1</ytd_start>
                 <mtd_start>1</mtd_start>
             </dashboard>
+            <crontab>
+                <viewed_expr>0 0 * * *</viewed_expr>
+            </crontab>
         </reports>
     </default>
     <crontab>
         <jobs>
             <aggregate_reports_report_product_viewed_data>
                 <schedule>
-                    <cron_expr>0 0 * * *</cron_expr>
+                    <config_path>reports/crontab/viewed_expr</config_path>
                 </schedule>
                 <run>
                     <model>reports/observer::aggregateReportsReportProductViewedData</model>
diff --git a/app/code/core/Mage/Reports/etc/system.xml b/app/code/core/Mage/Reports/etc/system.xml
index 9c7d9c8c3f6..3278ba6bec4 100644
--- a/app/code/core/Mage/Reports/etc/system.xml
+++ b/app/code/core/Mage/Reports/etc/system.xml
@@ -106,6 +106,23 @@
                         </mtd_start>
                     </fields>
                 </dashboard>
+                <crontab translate="label">
+                    <label>Cron Settings</label>
+                    <sort_order>3</sort_order>
+                    <show_in_default>1</show_in_default>
+                    <show_in_website>0</show_in_website>
+                    <show_in_store>0</show_in_store>
+                    <fields>
+                        <viewed_expr translate="label comment">
+                            <label>Most Viewed</label>
+                            <sort_order>800</sort_order>
+                            <show_in_default>1</show_in_default>
+                            <show_in_website>0</show_in_website>
+                            <show_in_store>0</show_in_store>
+                            <comment>Most Viewed Products Report</comment>
+                        </viewed_expr>
+                    </fields>
+                </crontab>
             </groups>
         </reports>
     </sections>
diff --git a/app/code/core/Mage/Sales/Model/Order.php b/app/code/core/Mage/Sales/Model/Order.php
index 0e4886d6d4d..8ef66866d32 100644
--- a/app/code/core/Mage/Sales/Model/Order.php
+++ b/app/code/core/Mage/Sales/Model/Order.php
@@ -1358,6 +1358,29 @@ public function getShippingMethod($asObject = false)
         }
     }
 
+    /**
+     * Get the current customer email.
+     *
+     * @return string
+     */
+    public function getCurrentCustomerEmail()
+    {
+        if (!$this->getData('current_customer_email')) {
+            if ($this->getCustomer()) {
+                $email = $this->getCustomer()->getEmail();
+            } elseif ($this->getCustomerId()) {
+                $email = Mage::getResourceSingleton('customer/customer')->getEmail($this->getCustomerId());
+            }
+            // Guest checkout or customer was deleted.
+            if (empty($email)) {
+                $email = $this->getCustomerEmail();
+            }
+            $this->setData('current_customer_email', $email);
+        }
+
+        return $this->getData('current_customer_email');
+    }
+
     /**
      * Queue email with new order data
      *
@@ -1417,7 +1440,7 @@ public function queueNewOrderEmail($forceMode = false)
         $mailer = Mage::getModel('core/email_template_mailer');
         /** @var Mage_Core_Model_Email_Info $emailInfo */
         $emailInfo = Mage::getModel('core/email_info');
-        $emailInfo->addTo($this->getCustomerEmail(), $customerName);
+        $emailInfo->addTo($this->getCurrentCustomerEmail(), $customerName);
         if ($copyTo && $copyMethod == 'bcc') {
             // Add bcc to customer email
             foreach ($copyTo as $email) {
@@ -1509,7 +1532,7 @@ public function queueOrderUpdateEmail($notifyCustomer = true, $comment = '', $fo
         if ($notifyCustomer) {
             /** @var Mage_Core_Model_Email_Info $emailInfo */
             $emailInfo = Mage::getModel('core/email_info');
-            $emailInfo->addTo($this->getCustomerEmail(), $customerName);
+            $emailInfo->addTo($this->getCurrentCustomerEmail(), $customerName);
             if ($copyTo && $copyMethod == 'bcc') {
                 // Add bcc to customer email
                 foreach ($copyTo as $email) {
diff --git a/app/code/core/Mage/Sales/Model/Order/Creditmemo.php b/app/code/core/Mage/Sales/Model/Order/Creditmemo.php
index 8c9c6e5ae9d..7f826a74af7 100644
--- a/app/code/core/Mage/Sales/Model/Order/Creditmemo.php
+++ b/app/code/core/Mage/Sales/Model/Order/Creditmemo.php
@@ -798,7 +798,7 @@ public function sendEmail($notifyCustomer = true, $comment = '')
         $mailer = Mage::getModel('core/email_template_mailer');
         if ($notifyCustomer) {
             $emailInfo = Mage::getModel('core/email_info');
-            $emailInfo->addTo($order->getCustomerEmail(), $customerName);
+            $emailInfo->addTo($order->getCurrentCustomerEmail(), $customerName);
             if ($copyTo && $copyMethod === 'bcc') {
                 // Add bcc to customer email
                 foreach ($copyTo as $email) {
@@ -873,7 +873,7 @@ public function sendUpdateEmail($notifyCustomer = true, $comment = '')
         $mailer = Mage::getModel('core/email_template_mailer');
         if ($notifyCustomer) {
             $emailInfo = Mage::getModel('core/email_info');
-            $emailInfo->addTo($order->getCustomerEmail(), $customerName);
+            $emailInfo->addTo($order->getCurrentCustomerEmail(), $customerName);
             if ($copyTo && $copyMethod === 'bcc') {
                 // Add bcc to customer email
                 foreach ($copyTo as $email) {
diff --git a/app/code/core/Mage/Sales/Model/Order/Invoice.php b/app/code/core/Mage/Sales/Model/Order/Invoice.php
index 13ea6634f40..f0af543c235 100644
--- a/app/code/core/Mage/Sales/Model/Order/Invoice.php
+++ b/app/code/core/Mage/Sales/Model/Order/Invoice.php
@@ -830,7 +830,7 @@ public function sendEmail($notifyCustomer = true, $comment = '')
         $mailer = Mage::getModel('core/email_template_mailer');
         if ($notifyCustomer) {
             $emailInfo = Mage::getModel('core/email_info');
-            $emailInfo->addTo($order->getCustomerEmail(), $customerName);
+            $emailInfo->addTo($order->getCurrentCustomerEmail(), $customerName);
             if ($copyTo && $copyMethod == 'bcc') {
                 // Add bcc to customer email
                 foreach ($copyTo as $email) {
@@ -905,7 +905,7 @@ public function sendUpdateEmail($notifyCustomer = true, $comment = '')
         $mailer = Mage::getModel('core/email_template_mailer');
         if ($notifyCustomer) {
             $emailInfo = Mage::getModel('core/email_info');
-            $emailInfo->addTo($order->getCustomerEmail(), $customerName);
+            $emailInfo->addTo($order->getCurrentCustomerEmail(), $customerName);
             if ($copyTo && $copyMethod == 'bcc') {
                 // Add bcc to customer email
                 foreach ($copyTo as $email) {
diff --git a/app/code/core/Mage/Sales/Model/Order/Shipment.php b/app/code/core/Mage/Sales/Model/Order/Shipment.php
index 3bcff32a721..91d69a94219 100644
--- a/app/code/core/Mage/Sales/Model/Order/Shipment.php
+++ b/app/code/core/Mage/Sales/Model/Order/Shipment.php
@@ -473,7 +473,7 @@ public function sendEmail($notifyCustomer = true, $comment = '')
         $mailer = Mage::getModel('core/email_template_mailer');
         if ($notifyCustomer) {
             $emailInfo = Mage::getModel('core/email_info');
-            $emailInfo->addTo($order->getCustomerEmail(), $customerName);
+            $emailInfo->addTo($order->getCurrentCustomerEmail(), $customerName);
             if ($copyTo && $copyMethod == 'bcc') {
                 // Add bcc to customer email
                 foreach ($copyTo as $email) {
@@ -543,7 +543,7 @@ public function sendUpdateEmail($notifyCustomer = true, $comment = '')
         $mailer = Mage::getModel('core/email_template_mailer');
         if ($notifyCustomer) {
             $emailInfo = Mage::getModel('core/email_info');
-            $emailInfo->addTo($order->getCustomerEmail(), $customerName);
+            $emailInfo->addTo($order->getCurrentCustomerEmail(), $customerName);
             if ($copyTo && $copyMethod == 'bcc') {
                 // Add bcc to customer email
                 foreach ($copyTo as $email) {
diff --git a/app/code/core/Mage/Sales/etc/config.xml b/app/code/core/Mage/Sales/etc/config.xml
index b362010f0b1..a0c6d6d9607 100644
--- a/app/code/core/Mage/Sales/etc/config.xml
+++ b/app/code/core/Mage/Sales/etc/config.xml
@@ -1703,6 +1703,15 @@
         <dashboard>
             <use_aggregated_data>0</use_aggregated_data>
         </dashboard>
+        <reports>
+            <crontab>
+                <sales_expr>0 0 * * *</sales_expr>
+                <shipping_expr>0 0 * * *</shipping_expr>
+                <invoiced_expr>0 0 * * *</invoiced_expr>
+                <refunded_expr>0 0 * * *</refunded_expr>
+                <bestsellers_expr>0 0 * * *</bestsellers_expr>
+            </crontab>
+        </reports>
     </default>
     <crontab>
         <jobs>
@@ -1716,7 +1725,7 @@
             </sales_clean_quotes>
             <aggregate_sales_report_order_data>
                 <schedule>
-                    <cron_expr>0 0 * * *</cron_expr>
+                    <config_path>reports/crontab/sales_expr</config_path>
                 </schedule>
                 <run>
                     <model>sales/observer::aggregateSalesReportOrderData</model>
@@ -1724,7 +1733,7 @@
             </aggregate_sales_report_order_data>
             <aggregate_sales_report_shipment_data>
                 <schedule>
-                    <cron_expr>0 0 * * *</cron_expr>
+                    <config_path>reports/crontab/shipping_expr</config_path>
                 </schedule>
                 <run>
                     <model>sales/observer::aggregateSalesReportShipmentData</model>
@@ -1732,7 +1741,7 @@
             </aggregate_sales_report_shipment_data>
             <aggregate_sales_report_invoiced_data>
                 <schedule>
-                    <cron_expr>0 0 * * *</cron_expr>
+                    <config_path>reports/crontab/invoiced_expr</config_path>
                 </schedule>
                 <run>
                     <model>sales/observer::aggregateSalesReportInvoicedData</model>
@@ -1740,7 +1749,7 @@
             </aggregate_sales_report_invoiced_data>
             <aggregate_sales_report_refunded_data>
                 <schedule>
-                    <cron_expr>0 0 * * *</cron_expr>
+                    <config_path>reports/crontab/refunded_expr</config_path>
                 </schedule>
                 <run>
                     <model>sales/observer::aggregateSalesReportRefundedData</model>
@@ -1748,7 +1757,7 @@
             </aggregate_sales_report_refunded_data>
             <aggregate_sales_report_bestsellers_data>
                 <schedule>
-                    <cron_expr>0 0 * * *</cron_expr>
+                    <config_path>reports/crontab/bestsellers_expr</config_path>
                 </schedule>
                 <run>
                     <model>sales/observer::aggregateSalesReportBestsellersData</model>
diff --git a/app/code/core/Mage/Sales/etc/system.xml b/app/code/core/Mage/Sales/etc/system.xml
index c0cabfe00a8..3336908b870 100644
--- a/app/code/core/Mage/Sales/etc/system.xml
+++ b/app/code/core/Mage/Sales/etc/system.xml
@@ -819,5 +819,58 @@
                 </creditmemo>
             </groups>
         </sales_pdf>
+        <reports>
+            <groups>
+                <crontab>
+                    <fields>
+                        <sales_expr translate="label comment">
+                            <label>Orders</label>
+                            <frontend_type>text</frontend_type>
+                            <sort_order>100</sort_order>
+                            <show_in_default>1</show_in_default>
+                            <show_in_website>0</show_in_website>
+                            <show_in_store>0</show_in_store>
+                            <comment>Total Ordered Report</comment>
+                        </sales_expr>
+                        <shipping_expr translate="label comment">
+                            <label>Shipping</label>
+                            <frontend_type>text</frontend_type>
+                            <sort_order>300</sort_order>
+                            <show_in_default>1</show_in_default>
+                            <show_in_website>0</show_in_website>
+                            <show_in_store>0</show_in_store>
+                            <comment>Total Shipped Report</comment>
+                        </shipping_expr>
+                        <invoiced_expr translate="label comment">
+                            <label>Total Invoiced</label>
+                            <frontend_type>text</frontend_type>
+                            <sort_order>400</sort_order>
+                            <show_in_default>1</show_in_default>
+                            <show_in_website>0</show_in_website>
+                            <show_in_store>0</show_in_store>
+                            <comment>Total Invoiced VS Paid Report</comment>
+                        </invoiced_expr>
+                        <refunded_expr translate="label comment">
+                            <label>Total Refunded</label>
+                            <frontend_type>text</frontend_type>
+                            <sort_order>500</sort_order>
+                            <show_in_default>1</show_in_default>
+                            <show_in_website>0</show_in_website>
+                            <show_in_store>0</show_in_store>
+                            <comment>Total Refunded Report</comment>
+                        </refunded_expr>
+                        <bestsellers_expr translate="label comment">
+                            <label>Bestsellers</label>
+                            <frontend_type>text</frontend_type>
+                            <sort_order>700</sort_order>
+                            <show_in_default>1</show_in_default>
+                            <show_in_website>0</show_in_website>
+                            <show_in_store>0</show_in_store>
+                            <comment>Products Bestsellers Report</comment>
+                        </bestsellers_expr>
+                    </fields>
+                </crontab>
+            </groups>
+        </reports>
     </sections>
 </config>
diff --git a/app/code/core/Mage/SalesRule/etc/config.xml b/app/code/core/Mage/SalesRule/etc/config.xml
index 9ae259337ee..0fdf8b999f2 100644
--- a/app/code/core/Mage/SalesRule/etc/config.xml
+++ b/app/code/core/Mage/SalesRule/etc/config.xml
@@ -203,7 +203,7 @@
         <jobs>
             <aggregate_sales_report_coupons_data>
                 <schedule>
-                    <cron_expr>0 0 * * *</cron_expr>
+                    <config_path>reports/crontab/coupons_expr</config_path>
                 </schedule>
                 <run>
                     <model>salesrule/observer::aggregateSalesReportCouponsData</model>
@@ -218,5 +218,10 @@
                 <format>1</format>
             </auto_generated_coupon_codes>
         </promo>
+        <reports>
+            <crontab>
+                <coupons_expr>0 0 * * *</coupons_expr>
+            </crontab>
+        </reports>
     </default>
 </config>
diff --git a/app/code/core/Mage/SalesRule/etc/system.xml b/app/code/core/Mage/SalesRule/etc/system.xml
index e920f918eda..e8b1831c38c 100644
--- a/app/code/core/Mage/SalesRule/etc/system.xml
+++ b/app/code/core/Mage/SalesRule/etc/system.xml
@@ -75,5 +75,22 @@
                 </auto_generated_coupon_codes>
             </groups>
         </promo>
+        <reports>
+            <groups>
+                <crontab>
+                    <fields>
+                        <coupons_expr translate="label comment">
+                            <label>Coupons</label>
+                            <frontend_type>text</frontend_type>
+                            <sort_order>600</sort_order>
+                            <show_in_default>1</show_in_default>
+                            <show_in_website>0</show_in_website>
+                            <show_in_store>0</show_in_store>
+                            <comment>Promotion Coupons Usage Report</comment>
+                        </coupons_expr>
+                    </fields>
+                </crontab>
+            </groups>
+        </reports>
     </sections>
 </config>
diff --git a/app/code/core/Mage/Tax/etc/config.xml b/app/code/core/Mage/Tax/etc/config.xml
index ae7a09ca59b..736c5e49f80 100644
--- a/app/code/core/Mage/Tax/etc/config.xml
+++ b/app/code/core/Mage/Tax/etc/config.xml
@@ -291,12 +291,17 @@
                 <url>https://web.archive.org/web/20150315064836/https://www.magentocommerce.com/knowledge-base/entry/magento-ce-18-ee-113-tax-calc</url>
             </notification>
         </tax>
+        <reports>
+            <crontab>
+                <tax_expr>0 0 * * *</tax_expr>
+            </crontab>
+        </reports>
     </default>
     <crontab>
         <jobs>
             <aggregate_sales_report_tax_data>
                 <schedule>
-                    <cron_expr>0 0 * * *</cron_expr>
+                    <config_path>reports/crontab/tax_expr</config_path>
                 </schedule>
                 <run>
                     <model>tax/observer::aggregateSalesReportTaxData</model>
diff --git a/app/code/core/Mage/Tax/etc/system.xml b/app/code/core/Mage/Tax/etc/system.xml
index 5b1b6bf6bc9..87f1779b1a1 100644
--- a/app/code/core/Mage/Tax/etc/system.xml
+++ b/app/code/core/Mage/Tax/etc/system.xml
@@ -261,7 +261,7 @@
                             <show_in_website>1</show_in_website>
                             <show_in_store>1</show_in_store>
                         </full_summary>
-                         <zero_tax translate="label">
+                        <zero_tax translate="label">
                             <label>Display Zero Tax Subtotal</label>
                             <frontend_type>select</frontend_type>
                             <source_model>adminhtml/system_config_source_yesno</source_model>
@@ -336,7 +336,7 @@
                             <show_in_website>1</show_in_website>
                             <show_in_store>1</show_in_store>
                         </full_summary>
-                         <zero_tax translate="label">
+                        <zero_tax translate="label">
                             <label>Display Zero Tax Subtotal</label>
                             <frontend_type>select</frontend_type>
                             <source_model>adminhtml/system_config_source_yesno</source_model>
@@ -349,5 +349,22 @@
                 </sales_display>
             </groups>
         </tax>
+        <reports>
+            <groups>
+                <crontab>
+                    <fields>
+                        <tax_expr translate="label comment">
+                            <label>Tax</label>
+                            <frontend_type>text</frontend_type>
+                            <sort_order>200</sort_order>
+                            <show_in_default>1</show_in_default>
+                            <show_in_website>0</show_in_website>
+                            <show_in_store>0</show_in_store>
+                            <comment>Order Taxes Report Grouped by Tax Rates</comment>
+                        </tax_expr>
+                    </fields>
+                </crontab>
+            </groups>
+        </reports>
     </sections>
 </config>