Suppose Jennifer decides to make cream of mushroom soup. Which result would be a cost?

 - The cream of mushroom soup will be tastier than the onion soup would have been.
 - Jennifer will spend more time making the cream of mushroom soup than she would have spent making the onion soup.
This result is a cost. It involves giving up or spending something that Jennifer wants or needs:
Jennifer will spend more time making the cream of mushroom soup than she would have spent making the onion soup.