Let C(x) represent the cost and R(x) the revenue, in dollars, associated with producing and selling x units of Dr. Little's Winning at Love - A Strategy Guide to the Game of Tennis. If C'(90) = 52 and R'(90) = 165, which one of the following statements is true? \" Producing and selling the 9lst item will have little to no effect on total prots. Producing and selling the 9lst item will decrease total profits. ' \\ Producing and selling the 9lst item will increase total prots. Since marginal revenue is greater than marginal cost, total prots are positive when 90 items have been sold. Since marginal revenue is greater than marginal cost, total prots are negative when 90 items have been sold