Suppose Alice decides to make chicken soup. Which result would be a cost?

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