Stuart Corporation paid one of its sales representatives $7,500 during the month of March. The rep is paid a base salary plus 514 per unit of product sold. During March, the rep sold 140 units. Required Calculate the total monthly cost of the sales representative's salary for each of the following months. April May July June 190 180 90 100 Month Number of units sold Total variable cost Total fixed cost Total salary cost S 0 S 0s 0 $ 0