Winter Is Coming Corp purchases a machine for $67,500. The estimated salvage value is $7,500, and estimated useful life is 8 years or 100,000 miles. What amount of depreciation does XYZ show for Year 2 of the machine, assuming XYZ uses the double-declining balance method. What is the per-mile (units of activity/production) depreciation rate? Round to the nearest penny. What is the net book value of the machine at the end of Year 1, assuming the straight-line method?