A company is able to produce 1,000 units of its flagship product each month. The cost of producing units each month is = $0.5 $500. The monthly demand for the product = 1,000 40, where is the selling price (in $) of each unit of the product. a. At what demand volume (integer value) is this product line profitable? b. What is the profit-maximizing demand volume? c. What is the price that maximizes profits?