What does the man ask for?

W: How can I help you, sir?
M: Could you break a 20 for me?
W: Sure. How do you want it?
M: Could I have two 5 ’ s and the rest in 1 ’ s?
W: Well, I have some 5 ’ s, but 1 don’t have enough 1 ’ s. Arc quarters OK with you?
M: OK, that’ s even better! In that case, I won’t have to worry about the small change for photocopying. I need to prepare a lot of materials for my study.
W: Here you go!
M: Thanks a million!