Find the Consumer's Surplus for a Commodity Whose Demand Function $D ( q ) = 30 e ^ { - 0.03 q }$

Multiple Choice

Find the consumer's surplus for a commodity whose demand function is $D ( q ) = 30 e ^ { - 0.03 q }$ dollars per unit if the market price is $p _ { 0 } = \$ 21$ per unit. (Hint: Find the quantity q₀ that corresponds to the given price p₀ = D(q₀) .)

A) $49.53
B) $49.81
C) $50.33
D) $53.41