a new machine costing $21,600 cash and estimated to have a $3,600 salvage value was purchased on january 1. the machine is expected to produce 2,000 units of product during its 10-year useful life. calculate depreciation expense in the first year under the following independent situations. the company uses the units-of-production method and the machine produces 300 units of product during its first year. the company uses the double-declining-balance method. the company uses the straight-line method.
