I think I going to need some iced water too. Is there an extra charge for that?
Yes, we charge 50 cents for 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 anything for the sauce, pepper and napkins?
No, there is no charge for those.