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.