A company estimates that it can sell \( 2,000 \) units each month of its product if it prices each unit at \( \$ 80 \) . However, its monthly number of sales will increase by \( 10 \) units for each \( \$ 0.25 \) decrease in price. The company has fixed costs of \( \$ 300 \) . The cost to make each unit is \( \$ 4.20 \) . Find the level of production that maximizes the company's profit.
They should produce \( \square \) units at a price of \( \$ \square \) , which will yield a profit of \( \$ \square \square\)