Suppose Kaylee decides to go as a superhero. Which result would be a cost?

 - Kaylee will save some time and money. She won't have to go out and get a new costume.
 - Kaylee will give up the chance to wear the costume she is more excited about.
This result is a cost. It involves giving up or spending something that Kaylee wants or needs:
Kaylee will give up the chance to wear the costume she is more excited about.