1. ระบบการแลกเปลี่ยนของต่อของ ( Bar

1. a system of exchanges (Barter System).Is to be exchanged between people who have needs for example, rice picked up with pork? Bring the eggs, picked up the fish. In practice, there are problems and obstacles arise for several reasons include:1. the problem of mismatch of people's need.2. problems with Exchange rates or pricing.3. the transport problems4. storage problems5. problems with the loans and debts.6. problems with some of the things the separation unit not.

1. Barter system (Barter System).The objects exchanged between those who have needs, such as the matching rice to hit the fish eggs pork for the practical problems and obstacles exist many reasons. Including1. The needs of people don"t match.2. Problems about exchange rate or price determination.3. Problems about transportation.4. Problems about preservation.5. Problems about the loan and repayment.6. Problems about something separate units.