Suppose Julie decides to take a trip to Minnesota. Which result would be a cost?

 - Julie will save some money. Plane tickets for Julie to get to Minnesota are less expensive than tickets to Tennessee.
 - Julie will give up the chance to go to Tennessee. She would have enjoyed a trip to Tennessee more than Minnesota.
This result is a cost. It involves giving up or spending something that Julie wants or needs:
Julie will give up the chance to go to Tennessee. She would have enjoyed a trip to Tennessee more than Minnesota.