For buying and selling, exchanging goods and services, products, and other services, also known as the exchange. 9 000 BC, distribution and animals. Such as cows, sheep and camels, some social use, 1 vegetables.200 BC in China began to use the shell mainly silver premiums shells. The premium is very successful. It was active.Hundreds of years later, leather used as money in China. And metal coins began to appear in various countries, such as the Persian and Greek.
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