Final answer:
Producer surplus is calculated as the selling price minus the seller's cost. In the scenarios, Jack has a producer surplus of $0, Angelina has $300, and Sanjay has $50,000. Market conditions like price ceilings or floors can affect surplus levels.
Step-by-step explanation:
Producer surplus is the amount that a seller is paid for a good minus the seller's actual cost of providing it. Here are the calculations for the producer surplus in the given scenarios:
a. $95 - Jack did not receive any surplus because the final bid was exactly his reserve price.
b. $300 (=$1,800 - $1,500) - Angelina received a surplus because she was willing to sell the car for $1,500 but received $1,800.
c. $50,000 - Sanjay received a large surplus because he was willing to do the job for free, but he earned a salary of $50,000.
Note that producer surplus can be affected by market conditions such as price ceilings or price floors, which alter the equilibrium and can result in different levels of surplus for consumers and producers,