We play the role of consumers. For example, if we need books to study, our parents get the money to buy them from their salaries. These come from the income that the market forces provide them with. Our parents and their employeers are part of the market forces. We go to a book store and spend the money on books. We buy from a book- store ,so the book store and we are part of the product market. The money we spend on books goes to the business area. The owner of the book-store gets his/ her share of the purchase , then the owner pays the book manufactures for the books he/ she has bought from them. The book store owner buys books in great amounts from book companies. In this way, the people in business get their income or profits. At the same time, the companies and the book-stores pay taxes , buy raw material and hire people - our parents - to keep the factor market active.