单项选择题

W: May I help you, Sir
M: Yes, could you show me some shirts Size 15, please.
W: All right, Sir. How about this one, it’s new style.
M: Oh, that must be file one I saw advertised in file paper.
W: Yes, that’s right.
M: Would you tell me the price
W: 10 dollars for one, and 17 dollars for 2.
M: All right, I’ll take 2.
W: Anything else, Sir
M: I may need some ties to match the shirts, but my birthday is next week and I may get some from my children.

How much does the man pay for the shirts he bought()