Answer:
Marginal social cost is the sum of marginal private cost and marginal external cost
Explanation:
Marginal social cost is the total cost society pays for the production of another unit or for taking further action in the economy.
Marginal Social Cost= MPC+MEC
where MPC = Marginal private cost
MEC = Marginal external cost
A private cost of production is a cost that is borne by the producer of a good or service. on the other hand, A marginal external cost is the cost of producing an additional unit of a good or service that falls on people other than the producer.