the marginal revenue curve of a monopoly crosses its marginal cost curve at $30 per unit, and an output of 2 million units.

the marginal revenue curve of a monopoly crosses its marginal cost curve at $30 per unit, and an output of 2 million units. The price that consumers are willing and able to pay for this output is $40 per unit. Ifit produces this output, the firm's average total cost is $43 per unit, and its average fixed cost is $8 per unit.What is the profit maximizing output? What are the firm's economic profits?