Answer:
Depreciation expense for Year 1 Year 2 Year 3 Year 4
Method: Straight-line $71,250 $71,250 $71,250 $71,250
unit-of-production $102,600 $91,200 $62,700 $28,500
Double-declining $160,000 $80,000 $40,000 $20,000
Total depreciation for the four years under:
- straight-line is $285,000
- unit-of-production is $285,000
- double-declining is $300,000
Step-by-step explanation:
(A) Under straight-line method, depreciation expense is (cost - residual value) / Estimated useful life = ($320,000 - $35,000) / 4 years = $71,250 yearly depreciation expense.
Accumulated depreciation for 4 years is $71,250 x 4 years $285,000.
The net book value (NBV) of the asset (cost - accumulated depreciation) is at the end of Year 4: $320,000 - $285,000 = $35,000.
(B) The unit-of-production method is used when the asset value closely relates to the units of output it is able to produce. It is expressed with the formula below:
(Original Cost - Salvage value) / Estimated production capacity x Units/year
At Year 1, depreciation expense (DE) is: ($320,000 - $35,000) / 20,000 operating hours x 7,200 hours = $102,600/year
At Year 2, depreciation expense (DE) is: ($320,000 - $35,000) / 20,000 operating hours x 6,400 hours = $91,200/year
At Year 3, depreciation expense (DE) is: ($320,000 - $35,000) / 20,000 operating hours x 4,400 hours = $62,700/year
At Year 4, depreciation expense (DE) is: ($320,000 - $35,000) / 20,000 operating hours x 2,000 hours = $28,500/year
Accumulated depreciation for 4 years is $102,600 + $91,200 + $62,700 + $28,500 = $285,000.
Note that this depreciation method results in higher depreciation charge when the asset is heavily used, at this time, it was in Year 1.
The NBV under this method is is: $320,000 - $285,000 = $35,000.
(C) The double-declining method is otherwise known as the reducing balance method and is given by the formula below:
Double declining method = 2 X SLDP X BV
SLDP = straight-line depreciation percentage
BV = Book value
SLDP is 100%/4 years = 25%, then 25% multiplied by 2 to give 50%
At Year 1, 50% X $320,000 = $160,000
At Year 2, 50% X $160,000 ($320,000 - $160,000) = $80,000
At Year 3, 50% X $80,000 ($160,000 - $80,000) = $40,000
At Year 4, 50% X $40,000 ($80,000 - $40,000) = $20,000
Accumulated depreciation for 4 years is $160,000 + $80,000 + $40,000 + $20,000 = $300,000.
The NBV under this method is is: $320,000 - $300,000 = $20,000.