public override decimal getPrice() //overriding
        {
            decimal totalProductPrice = CalculatePriceUtil.getTotalProductPrice(productList);
            decimal totalPackagePrice = CalculatePriceUtil.getTotalPackagePrice(packageList);
            decimal totalPrice        = totalProductPrice + totalPackagePrice;

            return(totalPrice);
        }
 public override decimal getPrice() //overriding
 {
     return(CalculatePriceUtil.getTotalProductPrice(productList));
 }