On 10/1/X1 Your Co. purchased a machine for $30000. It has a 8 year life or 40000 machine hours and a salvage value of $1200. 7- Use the straight-line method to calculate depreciation expense: 20X1 20X2 8 - Use the units-of-activity method to calculate depreciation expense: (The machine was used 1200 hours in 20X1 and 5200 hours in 20X2) Deprec. rate 20X1 20X2 9 - Use the double-declining balance method to calculate: Yr Beg. Book Value Depr. Rate Deprec. Exp. Accum. Depr. End. Book Value X1 X2 X3 | X4