How much should the man pay?

W: Here’s the stand.
M: Ah, yes. Hmm, how much is this chair? W: It’s $20.
M: Could you give me a discount?
W: A discount? Well, it depends on the size of the order. If you buy 50 units, I’ll give you a 5% discounts if you buy 100 units or more, I’ll give you a 10% discount.
M: Sounds good. OK, I’ll take 100.

A: Tomorrow is Saturday. Why don’t we eat out this evening?
B: Good idea. What kind of food do you like?
A: I like pizza.
B: Pizza? I’m tired of pizza. Why don’t we make a change? I know a place serves great Asian food.
A: OK.