public function setShippingCosts($amount, $vat = -1, $name = 'Shipping Costs') {
        $obj = Icepay_Order_Product::create()
                ->setProductID('01')
                ->setProductName($name)
                ->setDescription('')
                ->setQuantity('1')
                ->setUnitPrice($amount)
                ->setVATCategory(Icepay_Order_VAT::getCategoryForPercentage($vat));

        $this->addProduct($obj);

        return $this;
    }