Stuart Computer Services, Incorporated, has been in business for six months. The following are basic operating data for that period:

Month

July August September October November December

Service hours $114132254430320332$

Revenue $ $5,928$ $ $6,864$ $ $13,208$ $ $22,360$ $ $16,640$ $ $17,264$

Operating costs $ $4,300$ $ $5,290$ $ $7,160$ $ $11,140$ $ $9,160$ $ $10,560$

Required

What is the average service revenue per hour in each month and the overall average for the six$-$month period?

Use the high$-$low method to estimate the total monthly fixed cost and the variable cost per hour.

Determine the average contribution margin per hour.