Read the following conversation and answer the question.

M: Excuse me. What's the postage on this letter to New York, please?

W: How would you like to send it?

M: By registered airmail.

W: Eighty cents, please. And please write down the postal code in the mailing address. Anything else?

M: Yes. I'd like 6 postcards and 10 fifty-cent stamps, please.

W: All right. Here you are.

M: And this package is for London. Will you weigh it for me?

W: Yes, of course. This package is 10 grams overweight. You'll have to pay 50 cents extra for the overweight.

Question: Where are the speakers? 

- In a bank.

- In a bookshop.

- In a post office.


In a post office.