Please check my Grammar mistakes.

Hi, this is another new conversation I made up. Please help me to check the English fluency and Grammar mistakes.
Thank you for your help again.
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Man: Hello, Ms Parker. This David Walker from Faxit. I’ve been going over our customer lists, and I notice that your company is currently using our Model FX-100 fax machine, which came out five years ago. I’m just calling to see if you would be interested in upgrading it to our latest Model FX-101, which came out last month. The new model can fax and receive documents five times faster than the old Model FX-100.



Woman: I think it’s possible, but the FX-100 seems to be working just fine for us now. But, we are moving our office to another building for bigger space. So we are considering getting a new fax machine.



Man: Excellent! We are now offering our old customers a new upgrading promotion program. For those who bought FX-100 before can now pay just half of the retail price to get FX-101. That is 50% off. You just can’t miss the opportunity.



Woman: Well, that does sound very tempting. Let me talk to our accounting departing first and I’ll give you call later this after noon to let you know what we decide to do.



What is the purpose of the man’s call?

(A) He wants to sell a new machine.



(B) He wants to return a machine.

(C) He wants to repair a machine.

(D) He wants to exchange a machine.



What is the new model different from the old one?

(A) It costs more money.

(B) It saves more energy.

(C) It looks nicer

(D) It saves more time.



What does the woman decide to do?

(A) She is buying the new machine.

(B) She is not buying the new machine.

(C) She is not sure yet.

(D) She is selling the old machine.