Money and its functions

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Across
  1. 6. a piece of payer used to make payments (used less and less)
  2. 7. cards used for payments with money transferred immediately
  3. 9. the organisation responsible for issuing money and setting interest rates
  4. 11. essentially all types of money and accounts
  5. 12. notes and coins
  6. 13. a means of interaction, a substance that allows movement
Down
  1. 1. gold and silver in bars
  2. 2. cash and deposits held by banks at the central bank
  3. 3. the agreement to pay someone a sum of money
  4. 4. cards which allow you to borrow money for purchases
  5. 5. the currency used in a country or jurisdiction
  6. 8. a standard measure
  7. 10. a way or place to keep something