public void SetUp()
 {
     _itemCounter = Mock.Create<IItemCounter>();
     _itemCostCalculator = Mock.Create<IItemCostCalculator>();
 }
 public TotalCostCalculator(IItemCounter itemCounter, IItemCostCalculator itemCostCalculator)
 {
     _itemCounter = itemCounter;
     _itemCostCalculator = itemCostCalculator;
 }