从方框中选择恰当的句子补全下面的对话。

A. Can I try it on? B. I'll take it. C. How much is it? D. Can I help you? E. How about this blue one?

A:
B: Yes. This T-shirt is nice.
A: Sure. Here are you.
B:
A: It's $ 80.
B: Oh, that is too expensive.
A: It's $50.
B: Ok.