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they had a barter system. they didn't have money, just trade goods,
money
Barter
The invention of money supplemented the barter system by providing a nonperishable medium of exchange.
Barter system
Barter
barter
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A trade, an exchange, or barter. An economic system which operates without money is called a barter system.
A barter system uses no money. A volunteer does not work for money.
The exchange of one good for another without the use of money is called Barter.
A barter system uses no money. A volunteer does not work for money.