1. The system of exchange of the (Barter System) 
is the exchange of goods between people with the same needs, such as rice in exchange for pork. Fallopian redeemed fish In practice, there are barriers in place for several reasons 
: 1. People do not match the needs of the 
two. The problem with the exchange rate pricing or 
three. Problems with transport 
4. The problem with keeping 
five. Problems with lending and repayment 
6. The problem with some things not separated subunits.
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