完成对话，根据下下文在横线上填上合适的句子。
A: Can I help you?
B: __1__ . I'm looking for a shirt for myself.
A: What size do you wear.
B: Size 40.
A: __2__ ?
B: Blue.
A: I think these will be very nice.
B: Can I try it on here?
A: __3__ .
B: (Coming out of the change room) I think it's OK. But I'm afraid it's a bit expensive. Can I get it at a
discount?
A: Yes. it's 10% off today.
B: OK. __4__ . By the way do I have to pay cash (现金)?
A: Yes. Only cash.(Handing over the shirt) Here you are.
B: Thank you.
A: __5__.
