Rundle Corporation paid one of its sales representatives $7,000 during the month of March. The rep is paid a base salary plus $11 per unit of product sold. During March, the rep sold 150 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 190 100 200 110 Total variable cost Total fixed cost Total salary cost $ 0 $ 0 $ 0 $ 0