Robert Parish Corporation purchased a new machine for its assembly process on January 1, 2014. The cost of this machine was $315,900. The company estimated that the machine would have a salvage value of $15,900 at the end of its service life. Its life is estimated at 4 years, and its working hours are estimated at 40,000 hours. Year-end is December 31.
Instructions
Compute the depreciation expense under the following methods and complete the depreciation schedules below.
(a) Straight-line depreciation.
(b) Activity method for 2014 and 2015, assuming that machine usage was 15,000 hours for 2014; 11,710 hours for 2015; 12,150 hours for 2016 and 1,140 hours for 2017.
(c) Sum-of-the-years'-digits.
(d) Double-declining-balance.

(b) Activity method for 2014 and 2015, assuming that machine usage was 15,000 hours for 2014; 11,710 hours for 2015; 12,150 hours for 2016 and 1,140 hours for 2017.

depreciation expense per unit = $300,000 / 40,000 = $7.50 per unit

depreciation expense 2014 = $7.50 x 15,000 = $112,500

depreciation expense 2015 = $7.50 x 11,710 = $87,825

(c) Sum-of-the-years'-digits.

depreciation expense 2014 = $300,000 x 4/10 = $120,000

depreciation expense 2015 = $300,000 x 3/10 = $90,000

(d) Double-declining-balance.

depreciation expense 2014 = $315,900 x 2 x 1/4 = $157,950

depreciation expense 2015 = $157,950 x 2 x 1/4 = $78,975

depreciation expense 2016 = $78,975 x 2 x 1/4 = $39,487.50

depreciation expense 2017 = $39,487.50 - $15,900 = $23,587.50