Sara just came back from cairo, where the egyptian pound was worth $0.625 and she still has 1200 EGP from her trip and could exchange them for dollars at the airport but the airport foriegn exchnage desk only will buy them for $0.05 however sara next week she will travel to UAE and will need UAE dirham. The airport foreign exhange desk will sell sara dirhams for $0.27 per dirham. She met a tourist at the airport who is from UAE and is on his way to egypt. He is willing to buy sara's EGP 1200 for 210 AED ( UAE dirham) . Should sara accept the offer or cash the EGP at the airport ( please explain reasoning )