1. A:That's on meB:Thank you. Let me get you one please.orB: Thanks, but I am not permitted gratuities.2. A: Can you give me some change, please?B: Certainly, here you go.orB: I can give you that in large or small. 这几个对话都是什么意思?该怎么翻译呢?谢谢大家!