$_POST['po_detail_item'.$n], $_POST['item_code'.$n],
$_POST['item_description'.$n], $_POST['qty_recd'.$n],
$_POST['prev_quantity_inv'.$n], input_num('This_QuantityCredited'.$n),
$_POST['po_detail_item'.$n], $_POST['item_code'.$n],
$_POST['item_description'.$n], $_POST['qty_recd'.$n],
$_POST['prev_quantity_inv'.$n], input_num('This_QuantityCredited'.$n),