I think I need some iced water , too . Is there an extra charge for that ?   Yes . We charge 50 cents for iced water .   That's fine . Could you give me some more napkins , too ?   Sure . Do you need anything else ?   Yes . I would also like some sweet-and-sour sauce and pepper .   I'll put all that into the bag for you .   Do I owe you for the sauce , pepper and napkins ?   No , there's no charge for those . 