Rottino Company purchased a new machine on October 1, 2020, at a cost of $150,000. The company estimated that the machine will have a salvage value of $12,000. The machine is expected to be used for 10,000 working hours during its 5-year life.
Compute the depreciation expense under the following methods for the year indicated.
(a) Straight-line for 2020.
(b) Units-of-activity for 2020, assuming machine usage was 1,700 hours.
(c) Declining -balance using double the straight-line rate for 2020 and 2021.

The company estimated that the machine will have a salvage value of $12,000. The machine is expected to be used for 10,000 working hours during its 5-year life.

1) Straight-line:

Annual depreciation= (original cost - salvage value)/estimated life (years)

Annual depreciation= (150,000 - 12,000)/5= 27,600

2020:

Annual depreciation= (27,600/365)*92 days= $6,956.71

2) Units of activity:

Annual depreciation= [(original cost - salvage value)/useful life of production in units]*units produced

Annual depreciation= [(150,000 - 12,000)/10,000]*1.700= $23,460

3) Double-declining balance:

Annual depreciation= 2*[(book value)/estimated life (years)]

Annual depreciation= 2*27,600= 55,200

2020:

Annual depreciation= 55,200/365*92= 13,913.42

2021:

Annual depreciation= [138,000 - 13,913.42)/5]*2= 49,634.63