texts: Is it overweight ? </s> <s> I'm afraid it is . So you will have to pay two yuan extra . The total charge is four yuan . </s> <s> All right . Here is the money . </s> <s> Here are the stamps and your receipt . </s> <s> What shall I do with the receipt ?
labels: You can keep it until the addressee tells you that the letter has been delivered . It is the proof that you sent the letter if it fails to arrive .