31. Near the end of the war, the currency became practically worthless as a medium of exchange . 32. As a medium of exchange , money facilitates trade. 33. This posed a great problem, as gold was the medium of exchange of the local economy. 34. In this model, the essential function of money is its role as a medium of exchange . 35. In countries with troubled economies, including Russia, American dollars can be the principal medium of exchange . 36. Wadmal was a medium of exchange throughout Scandinavia. 37. They provided a medium of exchange , mostly used by city-states to hire mercenaries and compensate citizens. 38. Generally all " other claims " can be converted into a medium of exchange by monetization. 39. Early silver coins, known as sceattas, appeared, replacing the impractical gold thrymsa as a medium of exchange . 40. Duplicate stamps can be sold or traded, so they are an important medium of exchange among collectors.
