function add_or_update_purchase_data($supplier_id, $stock_id, $price, $description="", $uom="")
{
$data = get_purchase_data($supplier_id, $stock_id);
function add_or_update_purchase_data($supplier_id, $stock_id, $price, $description="", $uom="")
{
$data = get_purchase_data($supplier_id, $stock_id);
if ($data === false)
{
$sql = "INSERT INTO ".TB_PREF."purch_data (supplier_id, stock_id, price, suppliers_uom,
if ($data === false)
{
$sql = "INSERT INTO ".TB_PREF."purch_data (supplier_id, stock_id, price, suppliers_uom,