For the price function p(x)=0.5x+15 Where p is in dellars and x is the number seld in hundreds (0x30) and cost function C(x)=x+1280x+160 where C is in hundreds of doliars and x is the number sold in hundreds, use f(8) and Mp(8) to approxirnate the profit when 810 items are sold. Interpret the marginal proft yalue. At this level of production and sales, the profit increases about s * per addienal hundred items