public void init(List<Voucher> voucherList, List<BundleDiscount> bundleDiscountList, BigDecimal shippingFee, BigDecimal tax) {
		setVoucherList(voucherList);
		setBundleDiscountList(bundleDiscountList);
		
		shippingFee = shippingFee == null ? DEFAULT_TOTAL : shippingFee;
		setShippingFee(shippingFee);
		
		tax = tax == null ? DEFAULT_TOTAL : tax;
		setTax(tax);
	}