You have to decide between going on a cruise with friends or going on a service trip with Alternative Spring Break; both of which cost the same amount. You could also work over the break and earn some extra money, but this would be less valuable to you than either experience. If you choose the cruise, what is your opportunity cost?
there is no cost both cost the same and you can make money working over the break although your boss would see you as a more responsible man cause you choose the service break instead