Inventory Engine

		public virtual int CountItem(string itemName)
		{
			List<int> list = InventoryContains(itemName);
			if (list.Count > 0)
			{
				int sum = 0;
				for(int i = 0; i < list.Count; i++) {
					sum += Content[list[i]].Quantity;
				}
				return sum;
			}
			else
			{
				return 0;
			}
		}