public void Count()
{
//Arrange
var sut = new ShopItem();
//Act
sut.AddClass("Biscuits", 20);
sut.AddClass("Cook", 30);
sut.AddClass("Milk", 20);
sut.AddClass("Rice", 10);
sut.AddClass("Rice", 20);
//Assert
Assert.AreEqual(4, sut.TotalItem);
Assert.AreEqual(100, sut.Prices);
}