$_POST['prev_quantity_inv'.$n], input_num('this_quantity_inv'.$n),
$_POST['order_price'.$n], input_num('ChgPrice'.$n), $complete,
$_POST['std_cost_unit'.$n], "");
$_POST['prev_quantity_inv'.$n], input_num('this_quantity_inv'.$n),
$_POST['order_price'.$n], input_num('ChgPrice'.$n), $complete,
$_POST['std_cost_unit'.$n], "");