Final answer:
Kevin's producer surplus is $50.
Step-by-step explanation:
In this scenario, the producer surplus refers to the extra benefit that Kevin, the photographer hired for $500, receives beyond his actual cost of $450 to provide his services. To calculate Kevin's producer surplus, we need to find the difference between the price he receives and his actual cost.
His producer surplus would be:
Surplus = Price received - Actual cost = $500 - $450 = $50
Therefore, Kevin's producer surplus is $50.