Steve was planning to go on a cruise after final exams Tickets cost 500 including a nonrefundable 100 deposit and the cruise will give him 800 worth of benefit Two days before the date of the cruise Steves friends invite him to join them on a trip through Europe which will cost 350 and give Steven 700 worth of benefit Assuming that the trip through Europe is the only alternative to Steves time what is the opportunity cost of going on the cruise