Instead of using money that is incredibly hard to come by in this hard economic time we as humans at times need to use other alternative forms of money. For example, the other day I needed a new pair of grappling shorts for my upcoming tournament. However, I didn't have the forty dollars that the shorts cost, so I came up with a new agreement. I agreed with the owner of my gym that I would wash and clean the mats and the bathroom for a week straight in exchange for the pair of shorts. This would constitute as bartering or an exchange of a good for a service. Thanks evoke this was a cool assignment!