How much does one T-shirt cost?

W: I’d like to buy a T-shirt. But will I save any money if I buy a pair?
M: Yes. If you buy one, you have to pay six dollars, but you can have two of them for ten dollars.

M: Hello, Lucy, this is Bob Smith in the Center. Is Ted there?
W: Not yet, Bob. He phoned me from the office 10 minutes ago to say that he was going to have his hair cut.