Answer:
a. Straight-line method.
depreciable value = $246,000 - $62,000 = $184,000
deprecaition expense per year = $184,000 / 10 = $18,400
year depreciation expense book value
1 $18,400 $227,600
2 $18,400 $209,200
b. Units-of-production method.
depreciable value = $246,000 - $62,000 = $184,000
deprecaition expense per unit = $184,000 / 230,000 = $0.80
year depreciation expense book value
1 $28,000 $218,000
2 $24,800 $193,200
c. Double-declining-balance method.
depreciation expense year 1 = $246,000 x 1/10 x 2 = $49,200
depreciation expense year 2 = $196,800 x 1/10 x 2 = $39,360
year depreciation expense book value
1 $49,200 $196,800
2 $39,360 $157,440