听力原文：A: Hello, this is Tom Lock speaking. I'd like to see if my TV has been fixed. B: Let me see, Mr. Lock. What brand is yours? A: My TV is Star, 25 inches. B: Hold on please, I'll check it for you.... Hello, Mr. Lock, it is ready. When would you like to get it back? A: Is tomorrow afternoon OK? How late are you open? B: Tomorrow afternoon is fine. We are open until 6:00 p.m. A: By the way, how much do I owe you? B: Let me see.., it's 1,200 yuan. A: What? Are you sure? My TV came in yesterday with only a small problem. A switch didn't work properly. B: I can't believe it. The note on the TV says tube replaced... Oh, I'm terribly sorry, Mr Lock. This is somebody else's.... Here is yours. Ah, right. The note says 'replacement of a switch, 50 yuan—Tom Lock'. I'm awfully sorry for the mistake. A: Well, that's fine. It's an easy mistake. (20)