Answer:
The opportunity cost in this scenario is the benefits that Harry would have received from the activity he did not choose to pursue due to his other commitments.Opportunity cost is the forgone alternative, and it is the benefit that could have been enjoyed from an alternative that is rejected.Harry's original plan was to paint his apartment, but he had to choose between going fishing and visiting his parents, as well as attending the surprise party.The opportunity cost for Harry was the benefits he would have received from fishing, painting the apartment, or attending the surprise party. Harry chose to visit his parents, so the opportunity cost for him was the benefits he would have received from fishing, painting the apartment, and attending the surprise party.