Money   

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Money must meets the following characteristics:

  • Portable - Want to use whole tree trunks for money ?
  • Divisible - Ever tried to make change for a live cow ?
  • Fungible (Exchangible) - Can people agree on how much it is worth ?
  • Durable - Grapes would not make good money ?
  • a high ratio of value per unit of weight - A dollar's worth of lead ?

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