Final answer:
Commodity money, such as gold and salt, is a 'stock' of items used as a medium of exchange.
Step-by-step explanation:
Commodity money is a 'stock' of some item or group of items that is used as a medium of exchange. Examples of commodity money include gold and salt. Gold, for instance, can be used not only as money but also has value from its use in the electronics, aerospace, and jewelry industries.