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        They was used for pay taxes,it was invented by the mongolian emperor kublai khan. - 
  
  
        The first coin was a mixture of silver and gold,they was used for comercialiciating. - 
  
  
        They are simply signed instrucsions for pay directly for one account to other. - 
  
  
        The objetive of his creator was to stop the dishonnest employers for stealing money. - 
  
  
        They was first used in one restaurant of New York.