How should the woman pay for the books as the man suggests?

W: I wonder how I should pay for the books I just ordered?
M: You can pay by check．You can also use your credit card．In that case, you pay two dollars more．If I were you， I’d send them a check．

W: May I help you ?
M: Yes, I’d like to rent a car for a few days．
W: OK
M: Can you tell me the rate per day?
W: Yes, it’s 25 dollars．
M: Do you have a drop-off service?
W: No, I’m sorry．It will have to be returned to the airport．