Answer: The total cost (valued in dollars) of skipping practice and going to the movies (including the opportunity cost of time) is $23
Explanation: Opportunity cost is the cost of any activity measured in terms of the value of the next best alternative forgone (that is not chosen).
Here , you choose to skip work which pays $14 per hour and instead decide to attend a hour-long movie at an admission fee of $9. Therefore the total cost of skipping practice and going to movies is $14+$9=$23.