Exercise 11-9 Mixed cost at different levels of activity LO 11-1 Solomon Corporation paid one of its sales representatives $6,000 during the month of March. The rep is paid a base salary plus $10 per unit of product sold. During March, the rep sold 160 units. Required Calculate the total monthly cost of the sales representative's salary for each of the following months: July June May April Month 120 210 110 200 Number of units sold Total variable cost Total fixed cost 0 0 0 01 $ Total salary cost