you just came back from canada where the CAD was worth $ 0.70. you still have CAD 200 from your trip and could exchange them for dollars in the airport but the airport forien exchange desk will will only buy them for only $ 0.60. next week you will going Maxico and need peso, the airport foreign exchange desk will sell you peso for 0.10 per peso. you meet the tourist at the airport who is from maxico and on his way to canada, he is wiiling to buy CAD 200 for 1300 MXN peso, should you accept the offer or cash CAD in at the airport? Expain...