Depreciation by Three Methods; Partial Years

Perdue Company purchased equipment on April $1$ for $$270,000.$ The equipment was expected to have a useful life of three years, or $18,000$ operating hours, and a residual value of $$9,000.$ The equipment was used for $7,500$ hours during Year $1,5,500$ hours in Year $2,4,000$ hours in Year $3,$ and $1,000$ hours in Year $4.$

Required:

Determine the amount of depreciation expense for the years ended December $31,$ Year $1,$ Year $2,$ Year $3,$ and Year $4,$ by $($a$)$ the stralight$-$line method, $($b$)$ the units$-$ofactivity method, and $($c$)$ the double$-$declining$-$balance method. Note: Round all final values for each depreciation method and each year to the nearest whole dollar.

a$.$ Straight$-$line method

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