Depreciation Methods On january 2. 2015. Roth, Inc. purchased a laser cutting machine to be used in the fabrication of a part for one of its key products. The machine cost $120,000, and its estimated useful life was four years or 1.150.000 cuttings, after which it could be sold for $5.000. Required a. Calculate each year's depreciation expense for the machine's useful life under each of the following depreciation methods (round al answers to the nearest dollar): 1. Straight-line. 2. Double-declining balance. 3. Units-of-production, (Assume annual production in cuttings of 280.000: 430,000. 360.000, and s0.o00) r have ko problems 1. Straight-Line tnak can not. figare.o ee below, Depreciation Expense Year 2015 S28,750 v