Tell me the current rate for RMB, please.
请告诉我人民币的现价。
What's your selling rate for RMB yuan in notes today?
你们今天人民币现钞的售价是多少？
What's the dollar going for today?
美圆今天的售价是多少？
Our buying rate for notes is 523 yuan for 100 dollars.
我们100美圆的现钞买入价是523元。
It's 200 French francs at today's selling rate.
今天的卖出价是200法国法郎。
The buying rate of U.S. dollar notes is 460 yuan per hundred dollars.
美圆现钞买入价是100美圆付460元。

Useful Phrases
buying rate 买进价格
selling rate 卖出价格

　
And how much will it be in Japanese currency?
换成日本币是多少？
How much would I get for 300 Japanese yen?
300日圆可兑换多少钱？
I'd like to know the exchange rate for German marks.
我想知道德国马克的兑换率。
What rate are you giving?
你们提供的兑换率是多少？
What's the exchange rate today?