1. a u. s. student studied abroad in zürich, switzerland. when he arrived in zürich in january 2005, he exchanged $20,000 for swiss francs when the exchange rate of usd/chf (u. s. dollars to swiss francs) was 1.15. when he left zürich in january 2006, the exchange rate was 1.30. if he had started his year abroad in january 2006 instead of january 2005, would he have gotten more or fewer francs? what is the exact difference?