a. Complete the following cost schedule by computing marginal cost, average fixed cost, average variable cost, and average total cost. Instructions: Enter your responses rounded to the nearest whole number. Rate of Average Average Output Total Cost Marginal Average Cost Fixed Cost Variable Total Cost Cost $140 - O es 150 $ 10 N 170 $ 20 W 230 $ 60 A 380 $ 150 5 670 290 b. At what output rate is average total cost minimized? units