The depreciation deduction and the book value each year using the straight line method is
Year Depreciation deduction Book value
1 $24,000 $96,000
2 $24,000 $72,000
3 $24,000 $48,000
4 $24,000 $24,000
5 $24,000 0
Straight line depreciation expense = (Cost of asset - Salvage value) / useful life
120000 / 5 = $24,000
Depreciation expense each year would be $24,000
Book value = cost of the asset - accumulated depreciation
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