B: I'm sorry, sir. What seems to be the trouble? 对不起,先生。请问有什么问题?
A: I believe you have charged me twice for the same thing. Look, the figure of 6.5 dollar appears here, then again here. 我想你们对同一种东西进行了两次收费。看,6.5美元这个数字出现在这里,然后这里又出现了一次。
B: I'll just go and check it for you, sir. 我这就去为您核对一下,先生。