cost/price/charge

price 是指(货物买卖的)“价格”(an amount of money for which sth. is (to be) sold or bought)。

1. What is the price of this suit? 这套西服多少钱？

2. He sold the house at a good price. 他以高价出售了那所房子。

3. The price of this hat is $ 2.95. 这顶帽子的价格为 2.95 美元。

4. That shop was always empty because the prices were too high. 那家商店总是空荡荡的，因为那里的价格太高。

而 cost 除了作“成本”解之外,还作“某事的费用”解(the expense of doing sth. or having sth. done):

1. In those years the cost of living rose by nearly 4 per cent. 在那几年里生活费用几乎上涨了 $4\%$ 。

2. The cost of keeping a person in prison for a year is enormous. 把一个人关在监狱里一年所花的费用是巨大的。

3. She just had to pay the cost of food. 她只须付伙食费。

4. Living costs are usually higher in cities than in the country. 城市里的生活费用一般比农村高。

5. I will be happy to pay for the cost of the postage. 我很乐意付邮资。

你所提问的两个句子里的 price 应改为 cost, 因为这里是指“费用”。

charge 主要是指卖者或服务者所索要的“价钱”：

1. What is the charge for a telephone call? 打一个电话收费多少?

2. What are the charges in this hotel? 这家旅馆的住宿费用是多少？请做下面的英语试题：

3. The ____ of the shoes is low during the Spring Festival. A. price B. charge C. cost D. fee

4. There will be a small ____ for admission to the museum. A. price B. charge C. cost D. fee

5. The price ____, but I doubt whether it will remain so. A. went down B. will go down C. has gone down D. was going down(全国高考,99-16)

6. The price of the coal will vary according to how far it has to be transported and how expensive the freight ____ are. A. payments B. charges C. funds D. prices(全国六级,02.1-45)