The straight-line method results in an annual depreciation of $127700.
Due to usage, deterioration, or obsolescence, an item loses value over time. Depreciation is the measurement for this decline. Depreciation, or the decline in value of an asset, can also result from other factors, such as unfavorable market conditions, etc.
Briefing :
Depreciation expense using the straight-line depreciation method ,
(Actual cost - Salvage Value) / Number of years
=($129600 -$7600) / 4
=$127700
Therefore the amount of annual depreciation is $127700 .
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