make a discount multiplied by the quantity of goods, please

if($prodObj->get_attributes()[‘pa_size’] !== “large”){

return “<span>”.$item_price.”</span> <span class=’txt-discounted-amount’>“. get_woocommerce_currency_symbol().” “.$cart_original_price * $cart_quantity. “</span>”;

}

if($wwsd_discount_type == “flat”)

{
if($prodObj->get_attributes()[‘pa_size’] !== “large”){
$discount_msg = get_woocommerce_currency_symbol().” “.($wwsd_discounted_amount * $wwsd_arr_wholesale_discount_values[$product_id][‘quantity’]). ” скидка”;

$discount_msg = “<span style=\”color:#3eb903\”> [“.$discount_msg.”]</span>”;
}

}