function getPriceDiscount($_prod_group_id = '', $_slmaster_id = '') { $_prod_group_id = empty($_prod_group_id) ? $this->product_detail->prod_group_id : $_prod_group_id; if (empty($_slmaster_id) || empty($_prod_group_id)) { return 0; } return SLDiscount::getDiscount($_slmaster_id, $_prod_group_id); }