根据对话的上下文，在横线上写出所缺少的内容。
A: Good morning, sir. 1. _________?
B: I'd like to buy a white shirt. Do you have any white shirts?
A: Yes. 2. _________?
B: I want Size M.
A: Here you are.
B: Can I try it on?
A: Sure. Is it all right?
B: Yes. I like it very much. 3. _________?
A: 296 yuan.
B: That's a bit expensive. Do you have any other kind? I want a cheaper one.
A: What about this one? It is only 108 yuan.
B: OK. 4. _________. Here is the money.
A: 5. _________. Goodbye, sir.
1._______________________________________
2._______________________________________
3._______________________________________
4._______________________________________
5._______________________________________