Suppose Hector decides to go on the balloon race. Which result would be a cost?
Hector will give up the chance to go on the roller coaster. He would have had more fun on that ride. Hector will save some ride tickets. He needs fewer tickets to go on the balloon race than on the roller coaster.
Hector is deciding which ride to go on at the fair. He can go on either the roller coaster or the balloon race. He wants to have as much fun as possible at the fair.
Before you decide to do something, it is often helpful to list costs and benefits.
Costs are what you give up or spend when you decide to do something. Costs involve giving up things that you want or need.
Benefits are what you gain or save when you decide to do something. Benefits involve gaining something that you want or need.
This result is a cost. It involves giving up or spending something that Hector wants or needs:
Hector will give up the chance to go on the roller coaster. He would have had more fun on that ride.