AdventureWorks.UILogic.ViewModels.ShoppingCartPageViewModel.CalculateDiscount C# (CSharp) Method

        private double CalculateDiscount()
        {
            double discount = 0;
            foreach (var shoppingCartItemViewModel in _shoppingCartItemViewModels)
            {
                discount += shoppingCartItemViewModel.FullPriceDouble - shoppingCartItemViewModel.DiscountedPriceDouble;
            }

            return discount;
        }