-label_cells(_("Amount"), number_format2(-$receipt['ov_amount'], user_price_dec()), "class='tableheader2'");
-label_cells(_("Discount"), number_format2(-$receipt['ov_discount'], user_price_dec()), "class='tableheader2'");
+label_cells(_("Amount"), price_format($receipt['ov_amount']), "class='tableheader2'");
+label_cells(_("Discount"), price_format($receipt['ov_discount']), "class='tableheader2'");