Answer: Profit of charging the optimal block price is 73.5 cent or $0.74.
Explanation:
Given that,
The inverse demand function: P = 25 − 3Q (in cents)
Cost of producing = C(Q) = 1 + 4Q (in cents)
By charging the optimal block price, the firm produce at a point where
Price = Marginal Cost (MC)
MC = 4
Therefore,
25 − 3Q = 4
Q = 7
Consumer Surplus = Profit of charging the optimal block price=0.5 × (y-intercept of the demand curve -MC) × Q
= 0.5(25 - 4) × 7
= 73.5 cent
It is equivalent to $0.74.