Mr Frith: I like this TV very much. How much does it Assistant: It's the most expensive model in the shop. It costs 500 pounds. Mrs Frith: That's too expensive for us. We can't afford all that money. Assistant: This model's less expensive than that one. It's only 300 pounds.But, of course, it's not as good as the expensive one. Mr Frith: I don't like model.The other model's more expensive, but it's worth the money. Mr Frith: Can we buy it on instalments?(分期付款) Assistant: Of course. You can pay a deposit（保证金） of ten pounds, and then one pound a week for sixty weeks. Mr Frith: Do you like it, dear? Mrs Frith: I certainly do, but I don't like the price. You always want the best, but we can't afford it. Sometimes you think you're a millionaire! Mr Millionaires don't buy things on instalments!