A: Hi, I would like to exchange some foreign currency. What is the exchange rate between Chinese Yuan and U.S. dollars? B: Our buying rate today is six hundred and twenty Yuan per hundred dollars. A: Alright. So how much should I pay for eight hundred dollars? B: It will be four thousand nine hundred and sixty Yuan. Plus a service fee of three percent, the purchase will be five thousand one hundred and eight point eight Yuan in total. A: OK.