Monson& Company is an architectural firm specializing in home remodeling for private clients and new office buildings for corporate clients. Monson charges customers at a billing rate equal to 128%

of the client's total job cost. A client's total job cost is a combination of(1) professional time spent on the client $64 per hour cost of employing each professional) and (2) operating overhead allocated to the client's job. Monson allocates operating overhead to jobs based on professional hours spent on the job. Monson estimates its five professionals will incur a total of 10,000 professional hours working on client jobs during the year.

All operating costs other than professional salaries (travel reimbursements, copy costs, secretarial salaries, office lease, and so forth) can be assigned to the three activities. Total activity costs, cost drivers, and total usage of those cost drivers are estimated as follows:

	Total		Total Usage		Total Usage
	Activity		by Corporate		by Private
Activity	Cost	Cost Driver	Clients		Clients
Transporation to clients. . . . .	$6,000	Round-trip mileage to clients. .	2,000	miles	13,000	miles
Blueprint copying. . . . . . . .	34,000	Number of copies. . . . . . . . . . . . .	350	copies	650	copies
Office support. . . . . . . . . . . . . .	180,000	Secretarial time. . . . . . . . . . .	2,400	secretarial	2,600	secretarial
				hours		hours
Total operating overhead. .	$220,000

AnnikaLaughlin hired Monson to design her kitchen remodeling. A total of 2020 professional hours were incurred on this job. In addition, Laughlin's remodeling job required one of the professionals to travel back and forth to her house for a total of 160 miles. The blueprints had to be copied four times because Laughlin changed the plans several times. In addition, 19 hours of secretarial time were used lining up the subcontractors for the job.

Requirements

1.	Calculate the current indirect cost allocation rate per professional hour.
2.	Calculate the total amount that would be billed to Laughlin given the current costing structure.
3.	Calculate the activity cost allocation rates that could be used to allocate operating overhead costs to client jobs.
4.	Calculate the amount that would be billed to Laughlin using ABC costing.
5.	Which type of billing system is more fair to clients? Explain.