On January 1, 2012, a machine was installed at Dunbar Factory at a cost of $52,000. Its estimated residual value at the end of its estimated life of four years is $20,000. The machine is expected to produce 160,000 units with the following production schedule:
• 2012: 25,000 units
• 2013: 39,000 units
• 2014: 26,000 units
2015: 70,000 units
Complete depreciation schedules for
(a) Straight-line,
(b) Units-of-production,
(c) Double declining-balance at twice the straight-line rate methods.