Answer:
Colorado Corp.
The retroactive adjustment to the accumulated depreciation account on January 1, Year 9, as a result of the change in depreciation method is:
= $0.
Explanation:
a) Data and Calculations:
Accumulated depreciation at December 31, Year 8 based on double declining balance method = $525,000
Accumulated depreciation at December 31, Year 8 based on straight-line method = $300,000
The required adjustment to the accumulated depreciation account = $0 ($525,000 - $525,000)
b) The accumulated depreciation account does not require a retrospective adjustment. It will remain at $525,000 while the company continues to apply the straight-line method going forward. The change is called a change in accounting estimate and not a change in accounting principle that requires retrospective application and adjustment to the previous years' accounts.