public void Get_Each_Product_Price_For_Multiple_Quantities()
        {
            IDictionary <string, int> cart = new Dictionary <string, int>()
            {
            };

            cart.Add(new KeyValuePair <string, int>("A", 5));
            cart.Add(new KeyValuePair <string, int>("B", 5));
            cart.Add(new KeyValuePair <string, int>("C", 1));

            var products = ProgramBase.GetItemsPrices(cart);

            Assert.AreEqual(products[0].Key, "C");//Combination Promotions are calculated first
            Assert.AreEqual(products[1].Key, "A");
            Assert.AreEqual(products[2].Key, "B");
            Assert.AreEqual(products[0].Price, 20);
            Assert.AreEqual(products[1].Price, 230);
            Assert.AreEqual(products[2].Price, 120);
        }