Answer:
Sunk cost will be = $70
Step-by-step explanation:
Sunk Cost refers to the cost for which the amount has been already spent, and cannot be recovered. These are generally incurred and then not regarded for decision making as irrespective of decision being viable or not this cost cannot be avoided.
In the given instance, Damon Rutton Purchased the ticket of $70
This is the only cost which has already been incurred, else other costs of parking and food will only be incurred if he visits the game of Sarasota Shippers.
When he spend some time with his wife sunk cost will be = $70