5. Buying Textbooks

A: I can't spend anymore money after I buy my English textbook.

B: How much is your English textbook?

A: It's $198. I'm not kidding.

B: That's ridiculously expensive! What's the title of the textbook?

A: It's called How to Write Well.

B: Dude, someone is selling that book for $30.

A: No way. What edition is it?

B: I think it was the 10th edition.

A: Oh, no wonder he or she is selling it for only $30.

B: What edition do you need?

A: I need the 21st edition.

B: The publisher seems to be really making money, considering the number of editions.