Depreciation by three methods; partial years

Layton Company purchased tool sharpening equipment on October $1$ for $$67,500.$ The equipment was expected to have a useful life of $3$ years operating hours, and a residual value of $$1,890.$ The equipment was used for $900$ hours during Year $1,1,700$ hours in Year $2,1,500$ hours in Yea $760$ 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 straight$-$line met.

$($b$)$ the units$-$of$-$activity method, and $($c$)$ the double$-$declining$-$balance method.

Note: FOR DECLINING BALANCE ONLY, round the multiplier to four decimal places. Then round the answer for each year to the nea whole dollar.

a$.$ Straight$-$line method

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