What is the exchange of goods and services called?

What is exchange of goods mean?  To exchange goods between cultures?  Exchange one set of goods of another?  The exchange of ideascustomsand goods?  The bying of goods and service is called?  Exchange of goods for small bits of paper?  Of exchange of goods and servicesa system?  A sytem of exchange of goods and services?  A system of exchange of goods ans services?  Production and exchange of goods and services?  The free exchange of goods and services is called?  How did mespotamia exchange for goods and services?  Purchase goods or services on account is called capital?  What is cash received in exchange for goods or services?  People who wish to but good and service are called what?  What does the government exchange for goods and services?  What is the amount of money exchanged for a good ro service?  At which level of industry are goods and services exchanged?  Exchange of goods an services for another goods and services?  The exchange of goods and services is the basis for all what?