Scenario 12.1: Suppose Mountain Spring Water Can Be Produced at No Cost

Scenario 12.1:
Suppose mountain spring water can be produced at no cost and that the demand and marginal revenue curves for mountain spring water are given as follows:
Q = 6000 - 5P MR = 1200 - 0.4Q
-Refer to Scenario 12.1. What is the profit maximizing price of a monopolist?

A) $400
B) $600
C) $800
D) $900
E) none of the above