A manufacturer incurs the following costs in producing x rain jackets in one day for 0 < x < 200: fixed costs, $450; unit production cost, $30 per jacket; equipment maintenance and repairs, 0.08x2 dollars.
(A) What is the average cost (x)per jacket if x jackets are produced in one day?
(B) Find the critical values of  (x), the intervals on which the average cost per jacket is decreasing, the intervals on which the average cost per jacket is increasing, and the local extrema. Do not graph