13 A canoe company usually sells 200 canoes each month, priced at $900 each. The company did some research and found that for each $5 increase in price, the number of sales drop by 10 units. a) Determine the price function p(x), where x represents the number of products sold.b) Determine the revenue R(x), cost C(x), and profit P(x) functions. Assume each canoe would cost the company $50 to make. c) Determine the marginal profit value when 215 canoes are sold. What does this value mean