Before revision: Examples of commodities that have been used as media of exchange include gold, silver, copper, salt, peppercorns, tea, breakfast cereals, jewellery (watches, spectacles, etc.
After revision: cereal (granola bars),Examples of commodities that have been used as media of exchange include gold, silver, copper, salt, peppercorns, tea, breakfast cereals, jewellery (watches, spectacles, etc.