Suppose the Demand and Supply Curves for Units of University

Multiple Choice

Suppose the demand and supply curves for units of university credits are given by
Q^D = 5,000 - P
Q^S = -1,000 + 4P
Where Q^D is the quantity of credits demanded, Q^S is the quantity supplied, and P is the price in dollars for each unit. Consumer surplus at the equilibrium price is ____.

A) $14,440,000
B) $7,800,000
C) $6,000,000
D) $7,220,000