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CMA Final · Strategic Cost Management · Activity Based Cost Management

In an activity based costing system, which of the following is a unit-level activity whose cost driver is directly proportional to the number of units produced?

Machine hours consumed in machining each unit is a unit-level activity, because it is performed for every unit made and rises in proportion to output. Set-ups are batch-level, design changes are product-sustaining, and plant security is facility-sustaining, so none varies per unit.

  1. AMachine hours consumed in machining each unitCorrect
  2. BNumber of batch set-ups
  3. CProduct design changes for a product line
  4. DPlant security and building maintenance

Explanation

Unit-level activities are performed every time a unit is produced, so machine hours per unit vary with volume. Batch set-ups are batch-level, design changes are product-sustaining, and plant security is facility-sustaining; none varies with each unit.

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