Every family has different careers such as civil servants. The farmer Most of the time, and do professional trading community, therefore, is the exchange of goods. Regular exchange of rice.
Every family has a career that I was different, like most farmers, government officials have made the trade. Thus, in the community, so there Where to change the product. Exchange transactions belongings
Every family is the profession that different, such as government officials, farmer, most of all do trading. So in the community have to exchange goods. Exchange of goods, as usual.