Exercise 2-11A Mixed cost at different levels of activity LO 2-1 Solomon Corporation paid one of its sales representatives $4,000 during the month of March. The rep is paid a base salary plus $10 per unit of product sold. During March, the rep sold 300 units. Required Calculate the total monthly cost of the sales representative's salary for each of the following months: April May June July 320 180 360 200 Month Number of units Total variable cost Total fixed cost Total salary cost