I'm going to say "It set up the events necessary for the surprising conclusion." :)
Answer:
During my summer vacation me and Wesley drove my car to visit our family and we we stayed awake to see the comets until 3 AM. ( I believe this is it.)
Well you're getting money still for whatever you're trading off or getting opportunity from. So whether or not you don't get the same amount of money or cost you're still getting something