Answer :
a) To compute the annual straight-line depreciation, we need to subtract the residual value of the assets ($10,000) from the cost of the assets ($135,000) and divide the result by the number of years of the assets' service life (4 years):
Annual straight-line depreciation = ($135,000 - $10,000) / 4 years = $32,500
At the end of each year, the following journal entry would be posted to record the depreciation of the assets:
Debit: Depreciation Expense $32,500
Credit: Accumulated Depreciation $32,500
b) To compute the double-declining balance method, we need to first determine the double-declining balance rate by dividing 2 by the number of years of the assets' service life (4 years):
Double-declining balance rate = 2 / 4 years = 50%
The double-declining balance method calculates depreciation using the following formula:
Depreciation Expense = (Cost of Asset - Accumulated Depreciation) x Double-Declining Balance Rate
At the end of the first year, the following journal entry would be posted to record the depreciation of the assets using the double-declining balance method:
Debit: Depreciation Expense $67,500
Credit: Accumulated Depreciation $67,500
Where:
Depreciation Expense = ($135,000 - $0) x 50% = $67,500
At the end of the second year, the following journal entry would be posted to record the depreciation of the assets using the double-declining balance method:
Debit: Depreciation Expense $33,750
Credit: Accumulated Depreciation $33,750
Where:
Depreciation Expense = ($135,000 - $67,500) x 50% = $33,750
At the end of the third year, the following journal entry would be posted to record the depreciation of the assets using the double-declining balance method:
Debit: Depreciation Expense $16,875
Credit: Accumulated Depreciation $16,875
Where:
Depreciation Expense = ($135,000 - $101,250) x 50% = $16,875
At the end of the fourth year, the following journal entry would be posted to record the depreciation of the assets using the double-declining balance method:
Debit: Depreciation Expense $8,438
Credit: Accumulated Depreciation $8,438
Where:
Depreciation Expense = ($135,000 - $118,125) x 50% = $8,438
Note: The double-declining balance method results in higher depreciation expense in the earlier years of the assets' service life, compared to the straight-line method. This is because the double-declining balance method uses a higher depreciation rate in the early years and a lower rate in the later years. The choice of depreciation method will depend on the specific circumstances and needs of the company.
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