if ($receipt['ov_discount'] != 0)
label_cells(_("Discount"), number_format2(-$receipt['ov_discount']*$receipt['rate'], user_price_dec()), "class='tableheader2'");
else
if ($receipt['ov_discount'] != 0)
label_cells(_("Discount"), number_format2(-$receipt['ov_discount']*$receipt['rate'], user_price_dec()), "class='tableheader2'");
else