Grenier & Company is an architectural firm specializing in home remodeling for private clients and new office buildings for Corporate clients. Grenier charges customers at a billing rate equal to 132% of the client's total job cost. A client's total job cost is a combination of (1) professional time spent on the client ($62 per hour cost of employing each professional) and (2) operating overhead allocated to the client's job. Grenier allocates operating overhead to jobs based on professional hours spent on the job. Grenier estimates its five professionals will incur a total of 10,000 professional hours working on client jobs during the year. Click the icon to view the operating cost information.) Alissa Larson hired Grenier to design her kitchen remodeling. A total of 25 professional hours were incurred on this job. In addition, Larson's remodeling job required one of the professionals to travel back and forth to her house for a total of 120 miles. The blueprints had to be copied four times because Larson changed the plans several times. In addition, 21 hours of secretarial time were used lining up the subcontractors for the job. Read the requirements. Data Table 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 Activity Total Usage by Total Usage by Private Activity Cost Cost Driver Corporate Clients Clients Transporation to clients $ 12,000 Round-trip mileage to clients 6,000 miles 9,000 miles Blueprint copying 38,000 Number of copies 450 copies 550 copies Office support 2,400 secretarial hours 2,600 secretarial hours Total operating overhead $ 260,000 210,000 Secretarial time Requirements 1. Calculate the current indirect cost allocation rate per professional hour. 2. Calculate the total amount that would be billed to Larson given the current costing structure. 3. Calculate the activity cost allocation rates that could be used to allocate operating overhead co- to client jobs. 4. Calculate the amount that would be billed to Larson using ABC costing. 5. Which type of billing system is more fair to clients? Explain