Final answer:
To calculate the year 8 depreciation expense using the double-declining-balance method with revised estimates, one must find the book value at the beginning of year 8 and apply the new double-declining rate to the adjusted book value considering the revised salvage value.
Step-by-step explanation:
To calculate the depreciation expense for year 8, we need to account for the revised estimated useful life and salvage value as of January 1, year 8. The double-declining-balance method will be used. Here are the steps to determine the depreciation expense:
- Determine the book value at the beginning of year 8 (the end of year 7).
- Calculate the depreciation expense for years 6 and 7 using the double-declining rate (20% per year).
- Calculate the adjusted book value as of January 1, year 8, subtracting the accumulated depreciation from the original cost.
- Use the revised estimates to compute the remaining book value, which will be the new cost minus the revised salvage value.
- Apply the double-declining rate to the adjusted book value to find the depreciation expense for year 8.
Let's apply these steps:
- The double-declining rate is 20% (200% / 10 years).
- Year 6 depreciation: $100,000 x 20% = $20,000
- Year 7 depreciation: ($100,000 - $20,000) x 20% = $16,000
- Book value at the beginning of year 8: $100,000 - $20,000 - $16,000 = $64,000
- New useful life of 5 years implies a straight-line rate of 20%, but because it is double-declining, we double it to 40%.
- New book value is $64,000 - $15,000 (revised salvage value) = $49,000
- Year 8 depreciation: $49,000 x 40% = $19,600.
However, the options provided do not include $19,600. The student might have made an error in the multiple-choice options or the calculation in this solution may not have accounted for some unspecified factor. In such a situation, the tutor should work with the student to verify the options and clarify the calculation steps.