Exercise 11-9A (Algo) Mixed cost at different levels of activity LO 11-1, 11-2 Campbell Corporation paid one of its sales representatives $5,500 during the month of March. The rep is paid a base salary plus $13 per unit of product sold. During March, the rep sold 190 units. Required Calculate the total monthly cost of the sales representative's salary for each of the following months. Month April May June July Number of units sold 230 140 240 150 Total variable cost Total fixed cost Total salary cost $ 0 $ 0 $ 0 $