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Peter: Hello, I want to order some waterproof cloth. How many types do you have? Salesgirl: We have five different types. Here’s the price list. Peter: I think this type is quite good. But it’s a bit expensive... Our manufacturing costs will be too high. Salesgirl: Then how about this? It’s much cheaper. Peter: No, we bought a similar type before. But it didn’t work out too well. Salesgirl: What was the problem? Peter: It didn’t allow people to breathe. This first type... could you make it cheaper? Salesgirl: Well, since you’re my regular client, I can give you a 10% discount, OK? Peter: I need to consult my manager first. Could I take this sample back to show him? Salesgirl: Of course. No problem.