Mary Adams, the chief inspector, is wondering whether inspection labor-hours might be a better cost driver for inspection costs. Mary gathers information for weekly inspection costs, rooms inspected, and inspection labor-hours as follows: Week Rooms Inspected Inspection Labor-Hours Inspection Costs $1,740 254 66 322 110 2,500 3 335 82 2,250 4 431 123 2,800 198 48 1,400 6 239 62 1,690 252 108 1,720 8 325 127 2,200 Mary runs regressions on each of the possible cost drivers and estimates these cost functions: Inspection Costs = $193.19 + ($6.26 × Number of rooms inspected) Inspection Costs = $944.66 + ($12.04 x Inspection labor-hours) 1. Explain why rooms inspected and inspection labor-hours are plausible cost drivers of inspection costs. 2. Plot the data and regression line for rooms inspected and inspection costs. Plot the data and regres- sion line for inspection labor-hours and inspection costs. Which cost driver of inspection costs would you choose? Explain. 3. Mary expects inspectors to inspect 300 rooms and work for 105 hours next week. Using the cost driver you chose in requirement 2, what amount of inspection costs should Mary budget? Explain any implica- tions of Mary choosing the cost driver you did not choose in requirement 2 to budget inspection costs. Required

Principles of Cost Accounting
17th Edition
ISBN:9781305087408
Author:Edward J. Vanderbeck, Maria R. Mitchell
Publisher:Edward J. Vanderbeck, Maria R. Mitchell
Chapter2: Accounting For Materials
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Problem 17E: Davis Co. uses backflush costing to account for its manufacturing costs. The trigger points are the...
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Regression, activity-based costing, choosing cost drivers. Sleep Late, a large hotel chain, has been using activity-based costing to determine the cost of a night’s stay at their hotels. One of the activities, “Inspection,” occurs after a customer has checked out of a hotel room. Sleep Late inspects every 10th room and has been using “number of rooms inspected” as the cost driver for inspection costs. A signicant component of inspection costs is the cost of the supplies used in each inspection.

Mary Adams, the chief inspector, is wondering whether inspection labor-hours might be a better cost
driver for inspection costs. Mary gathers information for weekly inspection costs, rooms inspected, and
inspection labor-hours as follows:
Week
Rooms Inspected
Inspection Labor-Hours
Inspection Costs
$1,740
254
66
322
110
2,500
3
335
82
2,250
4
431
123
2,800
198
48
1,400
6
239
62
1,690
252
108
1,720
8
325
127
2,200
Mary runs regressions on each of the possible cost drivers and estimates these cost functions:
Inspection Costs = $193.19 + ($6.26 × Number of rooms inspected)
Inspection Costs = $944.66 + ($12.04 x Inspection labor-hours)
1. Explain why rooms inspected and inspection labor-hours are plausible cost drivers of inspection costs.
2. Plot the data and regression line for rooms inspected and inspection costs. Plot the data and regres-
sion line for inspection labor-hours and inspection costs. Which cost driver of inspection costs would
you choose? Explain.
3. Mary expects inspectors to inspect 300 rooms and work for 105 hours next week. Using the cost driver
you chose in requirement 2, what amount of inspection costs should Mary budget? Explain any implica-
tions of Mary choosing the cost driver you did not choose in requirement 2 to budget inspection costs.
Required
Transcribed Image Text:Mary Adams, the chief inspector, is wondering whether inspection labor-hours might be a better cost driver for inspection costs. Mary gathers information for weekly inspection costs, rooms inspected, and inspection labor-hours as follows: Week Rooms Inspected Inspection Labor-Hours Inspection Costs $1,740 254 66 322 110 2,500 3 335 82 2,250 4 431 123 2,800 198 48 1,400 6 239 62 1,690 252 108 1,720 8 325 127 2,200 Mary runs regressions on each of the possible cost drivers and estimates these cost functions: Inspection Costs = $193.19 + ($6.26 × Number of rooms inspected) Inspection Costs = $944.66 + ($12.04 x Inspection labor-hours) 1. Explain why rooms inspected and inspection labor-hours are plausible cost drivers of inspection costs. 2. Plot the data and regression line for rooms inspected and inspection costs. Plot the data and regres- sion line for inspection labor-hours and inspection costs. Which cost driver of inspection costs would you choose? Explain. 3. Mary expects inspectors to inspect 300 rooms and work for 105 hours next week. Using the cost driver you chose in requirement 2, what amount of inspection costs should Mary budget? Explain any implica- tions of Mary choosing the cost driver you did not choose in requirement 2 to budget inspection costs. Required
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