$sql_str = "SELECT *, option_mi.price as cost FROM option_price LEFT JOIN (SELECT option_mi.option_price_id, option_mi.price FROM option_mi GROUP BY option_mi.option_price_id) option_mi ON option_price.id = option_mi.option_price_id WHERE status ='Y'";
$sql_str = "SELECT * FROM option_price WHERE status ='Y'";