Suppose Wanda decides to get the rainbow sherbet ice cream. Which result would be a cost?

 - Wanda will give up the chance to eat the peach ice cream. She likes this flavor more than rainbow sherbet.
 - Wanda will get a free waffle cone. She will enjoy the waffle cone.
This result is a cost. It involves giving up or spending something that Wanda wants or needs:
Wanda will give up the chance to eat the peach ice cream. She likes this flavor more than rainbow sherbet.