From the following, prepare depreciation schedules for the first 2 years for
(a) Straight-line, 

(b) Units-of-production, 

(c) Double declining-balance at twice the straight-line rate.
• Machine purchased on January 1, $1,480.
• Residual value, $300.
• Estimated useful life, 4 years.
• Total estimated output, 500 units.
• Output year 1, 100 units.
• Output year 2, 150 units.