Thornton Computer Services, Incorporated, has been in business for six months. The following are basic operating data for that period: Service hours Revenue Operating costs July 120 $ 6,000 $ 4,300 Required A Required B August Month Average service revenue per hour 136 $ 6,800 $ 5,300 Required C Month September 260 $ 13,000 $ 7,100 October Complete this question by entering your answers in the tabs below. 420 $ 21,000 $ 11,200 Required a. What is the average service revenue per hour in each month and the overall average for the six-month period? b. Use the high-low method to estimate the total monthly fixed cost and the variable cost per hour. c. Determine the average contribution margin per hour. Required A November 320 $ 16,000 $ 9,100 December 330 $ 16,500 $ 10,600 What is the average service revenue per hour in each month and the overall average for the six-month period? July August September October November December Total Avera $ Required B >