The demand function for a certain brand of cd is given byp = −0.01x2 − 0.2x + 13where p is the unit price in dollars and x is the quantity demanded each week, measured in units of a thousand. the supply function is given byp = 0.01x2 + 0.8x + 1where p is the unit price in dollars and x stands for the quantity that will be made available in the market by the supplier, measured in units of a thousand. determine the producers' surplus if the market price is set at the equilibrium price. (round your answer to the nearest dollar.)