Question

Grenier & Company is an architectural firm, specializing in home remodelling for private clients and new office buildings for corporate clients. Grenier & Company charges customers at a billing rate equal to 131% of the client’s total job cost. A client’s total job cost is a combination of (1) professional time spent on the client ($63 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. 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:
Amy Lee hired Grenier & Company to design her kitchen remodelling. A total of 21 pro-
fessional hours were incurred on this job. In addition, Amy’s remodelling job required one of the professionals to travel back and forth to her house for a total of 123 km. The blueprints had to be copied four times because Amy changed the plans several times. In addition, 13 hours of secretarial time were used lining up the subcontractors for the job.
Requirements
1. Calculate the current operating overhead allocation rate per professional hour.
2. Calculate the amount that would be billed to Amy Lee 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 Amy Lee using ABC costing.
5. Which type of billing system is fairer to clients? Explain.


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  • CreatedApril 30, 2015
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