Suppose a company's revenue function is given by R(q) = -q" + 200q- and its cost function is given by C(q) - 230 + 15q, where q is hundreds of units sold/produced, while R(q) and C(q) are in total dollars of revenue and cost, respectively. A) Find a simplified expression for the marginal profit function. (Be sure to use the proper variable in your answer. MP(q) B) How many items (in hundreds) need to be sold to maximize profits? Answer: hundred units must be sold. (Round to two decimal places. )