【日常篇】Buy things 买东西- 5.4

[Dialogue A]

A:How much does that pen cost?

B:It costs ten dollars.

A:That's very expensive. Do you have anything cheaper?

B:Sure. This pen is only two dollars.

A:Good. I'll take it.

[Dialogue B]

A:How much is this book?

B:It's seven dollars.

A:Do you have change for a hundred?

B:No problem.

A:OK. Here's the money.

B:Thank you. Here's the book and your change.

[Tips]

1.How much [ does that pen cost/ is that pen]?

2.It costs /It's  ten dollars.

3.That's very expensive /cheap.

4.Do you have anything  cheaper/ special?