A manufacturer has determined that the average cost per unit of product when q units of the product are produced is + + 10 dollars. If the price per 300 given by AC - 59 9 unit is p dollars and the number of units produced is q = 200 - units of product per week, find the rate of change of TOTAL cost with respect to price when p = $50. a) Total cost is increasing at the rate of $385 per dollar increase in price. b) Total cost is decreasing at the rate of $962.50 per dollar increase in price. c) Total cost is decreasing at the rate of $187.50 per dollar increase in price. d) Total cost is decreasing at the rate of $2.50 per dollar increase in price