Seller: The total is $10.50. How will you pay? Mrs. Green: Do you take credit cards(信用卡)? Seller: Sorry, I don't. Cash(现金) only. Mrs. Green: OK, here's $20. Seller: Thanks. Here's your change. Do you need a bag? Mrs. Green: Yes, please. Seller: Here you go. Mrs. Green: Thank you. Have a nice day. Seller: You, too.Mrs. Green wants ________.