public ArrayList<Sales> salesForIndividualItemNum(ArrayList<Sales> als)
	{
		int itemChoice = 0;
		System.out.println("Enter the item number of the inventory item you would like to view.");
		boolean again = true;
		while(again)
		{
			try{
				itemChoice = input.nextInt();
				again = false;
			}
			catch (InputMismatchException e)
			{
				System.out.println("You must enter a whole number. Please try again.");
				input.nextLine();
			}
		}
		ArrayList<Sales> customList = new ArrayList<Sales>();
		for(Sales s : als)
		{
			int itemNum = s.getInv().getInvNum();
			if (itemNum == itemChoice)
				customList.add(s);
		}
		boolean test = customList.isEmpty();
		if(test)
			System.out.println("There have not been any sales for that item.");
		return customList;
		
	}