The deprecation expense in year 1 is $1225.
Depreciation is a method that is used to expense the carrying value of an asset. Straight line depreciation is a depreciation method that allocates the deprecation expense evenly across the useful life of the asset.
Straight line depreciation expense is a function of the useful life of the asset, the cost of the asset and the salvage value of the asset.
Straight line depreciation expense = (number of months from Sept to Dec / number of months in a year) x (Cost of asset - Salvage value) / useful life
(3/12) x [(28,400 - 3900) / 5]
1/4 x (24,500/5) = $1225
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