public void TestScenarioA() { cart.AddItem("A", 1); Assert.AreEqual(50, cart.CalculatePrice(store)); cart.ClearItems(); cart.AddItem("B", 1); Assert.AreEqual(30, cart.CalculatePrice(store)); cart.ClearItems(); cart.AddItem("C", 1); Assert.AreEqual(20, cart.CalculatePrice(store)); }