Homework: 4.2 A company that produces ribbon has found that the marginal cost of producing x yards of fancy ribbon is given by C'(x) = - 0.00002x- 0.04x + 46 for x $ 800, where C'(x) is in cents. Approximate the total cost of manufacturing 800 yards of ribbon, using 5 subintervals over [0,800] and the left endpoint of each subinterval. The total cost of manufacturing 800 yards of ribbon is approximately $ (Do not round until the final answer. Then round to the nearest cent as needed.)