从A-E选项中选择句子填空，补全对话。
A. How about this one?
B. Show me a cheaper one, please.
C. I want a shirt with a collar.
D. Can I help you?
E. How much is it?
Cashier: l_____
Billy: Yes, please. 2_____
Cashier: A shirt with a collar. 3_____
Billy: Oh, it looks great. I like it a lot. 4_____
Cashier: It's 110 dollars.
Billy: Oh, it’s too expensive. I have only 30 dollars. 5_____
