Dang Legal Services provides legal advice to clients. The following data apply to the first six months of operation:

Required
a. What is the average service revenue per hour for the six-month time 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.
d. Use the scattergraph method to estimate the total monthly fixed cost and the variable cost per hour.
e. Compare the results of the two methods and comment on anydifferences.

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Month Jan. Feb. Mar. Apr. May June 100 140 180 220 Revenue$8,000 $10,000 $14,000 $18,000 $20,000 $22,000 10,600 10,900 11,600 Service hours 80 200 Operating costs 7,400 8,200 9,660