A manufacturer estimates marginal revenue to be 200q^(1/2) dollars per unit when the level of production is

Question:

A manufacturer estimates marginal revenue to be 200q^(−1/2) dollars per unit when the level of production is q units each hour. The corresponding marginal cost has been found to be 0.6q dollars per unit. If the manufacturer's profit is 2000 dollars when the hourly level of production is 49 units, what is the profit when the level of production is 64 units each hour?