听力原文：M: Hi, would you like some help? W: Well, I'm looking for something I saw at a friend's house a few days ago. He said he bought here in your store. It's a bright metal shelf, almost a yard long and two feet high. It can be attached to a cabinet or refrigerator. I'm a biologist and I want to use it for my slides and samples. M: You're in the right department. But I'm sorry to tell you that we don't have it in stock now. It seems that quite a few people are in need of it. W: Oh, that's too bad. Are you going to get more? When is it possible for me to come again to buy it? M: They are on order now. They will arrive in about several days. I will inform. you as soon as it is available. But what I should tell you is that the price has gone up a little. W: Just my luck. Anyhow I don't mind the price because it is what I'm looking for. M: Right! When you really need something and find it useful, price is second in consideration. W: Would you tell me something about the price change? M: Originally they were $12.50. But the new ones will almost three dollars more. Stop in next week. We should have them by then. Where is the conversation most likely taking place?