$ls_final_order_amount = fn_linked_products_in_cart_amount($ls_total_products, $product['product_id']);
     //for template logic to hide the add to cart button
     if ($ls_final_order_amount > 1) {
         //linked variants(not products present in cart)
         //decrement the inventory
         $product['amount'] = $product['amount'] - $ls_final_order_amount + 1;
     }
     //custom availability message for linked products
     $sufficient_in_stock = fn_ls_sufficient_stock($ls_total_products[$product['combination_hash']]);
     Registry::get('view')->assign('sufficient_in_stock', $sufficient_in_stock);
     $ls_individual_estimation = fn_ls_delivery_estimation($ls_total_products[$product['combination_hash']], $product['combination_hash'], 0, true);
 } else {
     //product in cart
     Registry::get('view')->assign('ls_product_in_cart', true);
     //get product and linked products details
     fn_ls_get_linked_products($ls_total_products);
     //get total linked products for the order
     fn_ls_linked_products_order_total($ls_total_products);
     $ls_final_order_amount = fn_linked_products_in_cart_amount($ls_total_products, $product['product_id']);
     foreach ($ls_total_products as $hash => $array) {
         if ($array['ls_db_hash'] == $product['combination_hash']) {
             //this product is already in cart
             //custom availability message for linked products
             $sufficient_in_stock = fn_ls_sufficient_stock($ls_total_products[$hash]);
             Registry::get('view')->assign('sufficient_in_stock', $sufficient_in_stock);
             //set the product page order amount
             //  $array['order_amount'] = 1;
             // decrement the inventory amount
             if ($product['tracking'] === 'B') {
                 //tracking without options
                 if ($ls_final_order_amount > 1) {
function fn_ls_delivery_estimation_total($cart_products)
{
    //var_dump($cart_products);
    //get linked products and its details
    fn_ls_get_linked_products($cart_products);
    //get common linked products order total
    fn_ls_linked_products_order_total($cart_products);
    //pass here only linked products that are in cart
    //correct the inventory and order amounts if there are linked products in cart
    fn_linked_products_in_cart_amount($cart_products);
    $ls_shipping_estimation = 0;
    $ls_individual_estimations = array();
    $ls_all_estimations = array();
    foreach ($cart_products as $combination_hash => $product) {
        $ls_shipping_estimation = max(fn_ls_delivery_estimation($product, $combination_hash, $ls_shipping_estimation), $ls_shipping_estimation);
        //total delivery estimation
        //shipping estimation for individual products
        //   $ls_individual_estimations[$combination_hash] = fn_ls_delivery_estimation($product, $combination_hash, 0);
        $ls_individual_estimations[$combination_hash] = fn_ls_delivery_estimation($product, $combination_hash, 0);
        //check if the estimation is Sunday
        if (date("D", $ls_individual_estimations[$combination_hash]) === 'Sun') {
            //add one more day to the estimation
            $ls_individual_estimations[$combination_hash] = $ls_individual_estimations[$combination_hash] + 24 * 60 * 60;
        }
        //    echo "<br>ls_individual_estimation for $combination_hash is ".date('d m Y ',$ls_individual_estimations[$combination_hash]);
    }
    //check if the estimation is Sunday
    if (date("D", $ls_shipping_estimation) === 'Sun') {
        //add one more day to the estimation
        $ls_shipping_estimation = $ls_shipping_estimation + 24 * 60 * 60;
    }
    $ls_all_estimations['total_estimation'] = $ls_shipping_estimation;
    $ls_all_estimations['individual_estimations'] = $ls_individual_estimations;
    return $ls_all_estimations;
}