Próbowałem wyłączyć cenę bazową:
// If the calculated price (after all discounts) is different than the base price
// we show the old price striked through
if (priceWithDiscountsDisplay.toFixed(2) != basePriceDisplay.toFixed(2))
{
//$('#old_price_display span.price').text(formatCurrency(basePriceDisplay, currencyFormat, currencySign, currencyBlank));
//$('#old_price, #old_price_display, #old_price_display_taxes').removeClass('hidden').show();