Complete the following passage with the words in the box. Each can be used only once.

    Take a walk through a supermarket. You will find many brands(品牌)of chocolate and a dozen kinds of yoghurt. Which ones should you buy?

    Well, the answer . You may have your favorites. If there is a brand you like more than other brands, you might be willing to pay  money for it. But when you don't like one brand over another, the right move is to shop for the best price. It means putting one item next to a(n)  item to see which gives you more for your money. This isn't always easy because of the way things are packaged. To find the best deal, check the unit price. Stores usually show the unit price on the . If they don't, you can calculate it yourself.