The "Barter" or "Bartering" system.
BARTER
Econcomic System
Barter
Goods and services are exchanged without the use of money.
Goods and services are exchanged without the use of money.
It's called TRADE BY BARTER.
Goods and services are exchanged without the use of money.
Goods and services are exchanged without the use of money
The gases that are exchanged are oxygen and carbon dioxide.
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A sale is a transaction where a person gives money for a good or service and receives that good or service. A sale can also use the barter system where goods or services are exchanged for other goods or services.
Carbon dioxide