MStore API By InspireUI

$new_price = $cart_item['data']->get_price();
if (class_exists('WOOCS')) {
    global $WOOCS;
    if ($WOOCS->is_multiple_allowed) {
        $currrent = $WOOCS->current_currency;
        if ($currrent != $WOOCS->default_currency) {
            $currencies = $WOOCS->get_currencies();
            $rate = $currencies[$currrent]['rate'];
            $new_price = $new_price / $rate;
        }
    }
}
$new_price = $new_price + $add_price;