How do members of a traditional economy trade goods

They use a barter system instead of money. This is where you trade one good or service for another. Effectively, the rules and exchange rates are arbitrary and it depends on what the members agree on.

For example, let's say a farmer grows wheat. If the farmer needs a fish, then he could trade a bushel of wheat for a pound of fish.

traditional economies are often based on one ir a few agriculture, hunting, fishing, and gathering. often people in traditional economy lives in thier familes or tribes. societies may follow herds of animals in order to hunt and sustain in the traditional ecoomy. many people progress from hunters to farmers where they can place permenant structures and starts a society