Why is simple food spread all over the supermarket?

How do you decide what you are going to buy in a supermarket? Do you look in the refrigerator and the kitchen cupboards and make a list? Do you think about what you want to cook and then buy the food you need7 Even if you do these things, the supermarket makes some of the decisions for you.
    Specialists in marketing have studied how to make people buy more food in a supermarket. They do all kinds of things that you do not even notice. For example, the simple, ordinary food that everybody must buy, like bread, milk, flour and vegetable oil, is spread all over the store. You have to walk by all the more interesting — and more expensive — things in order to find what you need. The more expensive food in packages with bright-colored pictures. This food is placed at eye level so you see it and want to buy it. The things that you have to buy anyway are usually located on a higher or lower shelf. However, candy and other things that children like are on lower shelves. One study showed that when a supermarket moved four products from floor to eye level, it sold 78 percent more.
    Another study showed that for every minute a person is in a supermarket after the first half hour, she or he spends $0.50. If someone stays forty minutes, the supermarket has an additional $5.00. So the store has a comfortable temperature in summer and winter, and it plays soft music. It is a pleasant place for people to stay — and to spend more money.