public void CPlusD()
        {
            //Mention quantity of SKU ID's(Products) in order A,B,C,D
            ShoppingClass obj    = new ShoppingClass();
            double        result = obj.ShoppingCart(0, 0, 1, 1);

            Assert.AreEqual(30, result);
        }
        public void ScenarioC()
        {
            //Mention quantity of SKU ID's(Products) in order A,B,C,D
            ShoppingClass obj    = new ShoppingClass();
            double        result = obj.ShoppingCart(3, 5, 1, 1);

            Assert.AreEqual(280, result);
        }
        public void TwoB()
        {
            //Mention quantity of SKU ID's(Products) in order A,B,C,D
            ShoppingClass obj    = new ShoppingClass();
            double        result = obj.ShoppingCart(0, 2, 0, 0);

            Assert.AreEqual(45, result);
        }