public void WhenTheItemIsMoreThan100()
        {
            //Arrange
            var systemUnderTest = new ItemPriceCalculator();
            var apple           = new Product(10.01m, "Apple");

            var item = new Item(apple, 10);

            //Act
            var total = systemUnderTest.CalculateCost(item);

            //Assert
            Assert.That(total, Is.EqualTo(120.12m));
        }