Don't you think the price is reasonable? 你认为这个价格不公正吗？

     Here is your change and your receipt. 这是你的找头和发票。

     We' ll give you the change in local currency if that is all right. 如果可以的话，我们将以本国现金给你找头。

     Would you please check it, sir? 请你核对一下好吗，先生？

     We don't accept tips. Thank you just the same. 我们不接受小费，心领了。