In early July, Colin Marks purchased a $78 ticket to the December 15 game of the Sarasota Shippers. Parking for the game was expected to cost approximately $30, and Marks would probably spend another $23 for a souvenir program and food. It is now December 14. The Shippers were having a miserable season and the temperature was expected to peak at 5 degrees on game day. Marks therefore decided to skip the game and took his wife to the movies, with tickets and dinner costing $57. The sunk cost associated with this decision situation is:

Multiple Choice

• $21.

• $57.

• $78.

• $131.

• None of the answers is correct.