选择合适的句子补全对话

A. We have these black shoes and those brown shoes.

B. They're 150 yuan.

C. Can I help you?

D. Do you want anything else?

E. I want a pair of those blue jeans.

Assistant: ?

Ben: Yes, I want a pair of shoes.

Assistant: .

Ben: How much are the black shoes?

Assistant:

Ben: I'll take them. . How much are they?

Assistant: They're 200 yuan.

Ben: No, thanks.