Question

If the equilibrium price rises from $60 to $120, what is the additional producer surplus to initial producers in the market?

Answer 1

Based on the graph I found in searching for similar question,
Equilibrium price of 60 has a quantity of 80.
Equilibrium price of 120 has a quantity of 160.

Additional producer surplus to initial producer is:

(120-60) * (160-80) = 60 * 80 = 4,800