How much is it?
這個多少錢?

Do you have this in another color?
有其他的顏色嗎?

Do you have this in a medium (an extra small)?
有M號尺寸(或XS)嗎?

I want two of this.
我要買2個

May I see it?
我可以看一下嗎?

Can I try it on?
可以試穿嗎?

I like that one.
我喜歡這個

Do you take returns?
可以退貨嗎?

Do you take credit cards?
可以用信用卡支付嗎

Can I get a receipt, please?
請給我收據

Can I use this coupon?
我可以使用這個折價卷嗎?

Could you gift wrap it, please?
可以幫我包裝嗎?

Are there any sales going on?