Carl: Hey, Sis.Are you interested in buying some used books for school?    4   

Ashley: Well, what do you have?

Carl: I have a science book, Today's World,and I'm selling it for thirty dollars.

Ashley:Thirty?   5   What else are you selling?

Carl: Well, I have an English writing textbook for fourteen dollars, a math book for twenty-three, and a novel for only seven bucks.Ashley: 1'll take the English book and the novel.   6   I think I'll hold off on buying other books for now.