A manufacturer incurs the following costs in producing x water ski vests in one day, for 0 6 x 6 150: fixed costs, $320; unit production cost, $20 per vest; equipment maintenance and repairs, 0.05×2 dollars. So, the cost of manufacturing x vests in one day is given by C1x2 = 0.05×2 + 20x + 320 0 6 x 6 150 (A) What is the average cost C1x2 per vest if x vests are produced in one day? (B) Find the critical numbers of C1x2, the intervals on which the average cost per vest is decreasing, the intervals on which the average cost per vest is increasing, and the local extrema. Do not graph.
