Suppose Michael decides to go on the flying bobsled. Which result would be a cost?

 - Michael will give up the chance to go on the super starship. He would have had more fun on that ride.
 - Michael will save some ride tickets. He needs fewer tickets to go on the flying bobsled than on the super starship.
This result is a cost. It involves giving up or spending something that Michael wants or needs:
Michael will give up the chance to go on the super starship. He would have had more fun on that ride.