Current Attempt in Progress Let C (q) represent the cost and R (q) represent the revenue, in dollars, of producing q items. (a) If C (50) = 4700 and C' (50) = 23, estimate C (55). C (55) = $ i (b) If C' (50) = 23 and R' (50) = 35, approximately how much profit is earned by the 51 st item? The profit on the 51 st item is dollars. (c) If C' (100) = 39 and R' (100) = 35, should the company produce the 101st item? The company produce the 101st item