Assume a competitive firm faces a market price of $70, a cost curve of C= 0.004q^3+ 50q+750.

and the marginal cost curve of:

MC=0.12q2+50

The firm's profit-maximizing output level to the nearest tenth is 40.8 units, and the profit to the nearest penny at this output level is $ -205.67. In this case , firms will exit. This will cause the market supply to shift left. This will continue until the price is equal to the minimum average cost of $ . Round answer to the nearest penny.