Find the Consumer's Surplus for a Commodity Whose Demand Function $D ( q ) = \frac { 500 } { 0.4 q + 3 }$

Multiple Choice

Find the consumer's surplus for a commodity whose demand function is $D ( q ) = \frac { 500 } { 0.4 q + 3 }$ dollars per unit if the market price is $p _ { 0 } = \$ 100$ per unit. (Hint: Find the quantity q₀ that corresponds to the given price p₀ = D(q₀) .)

A) $130.52
B) $138.53
C) $142.01
D) $145.43