16A-2. From the following, prepare depreciation schedules for the first 2 years for (a) straight-line, (b) units-of-production, and (c) double declining-balance at twice the straight-line rate methods. 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. M