What does the man want to do?

M: I picked up a cell phone here the other day, but there is something the matter with the screen. It keeps blinking out all the time. I would like an exchange on it, please.(59)
W: Of course, sir. Why don’t you give that to me, and I can get you a new one from the back room right away?
M: Actually, I was wondering if I could take another model instead? I was told that the new X-100 model has far more functions than the one I got.(60)Do you have it in stock today?
W: Yes, we do, and I think you have made a wise choice. This particular model was only released a week ago, and they’re selling like hot cakes. Of course it is a bit more expensive,(60)and you will have to pay for the difference, but I think it will be well worth your money.