DC is a famous timbered company tries to have a contract to sell their "AB product" to a foreign country, especially one across the sea. The fixed cost for the production of the product is $9,600,000 annually The variable cost per thousand board feet is $131.50. The price charged will be determined by p= $522-15/10)D per 1,000 board feet. a) Determine the optimal monthly sales volume for this product b) Calculate the profit (loss) at the optimal volume. c) Find the volume at which breakeven occurs and the range (domain) of profitable demand. d) Construct the economic breakeven chart. e) What the range (domain) of profitable demand if the variable cost are reduced to 5%