Nadir Company purchased a milling machine on January 3, Year 1 for $55,000. The machine was being depreciated on the straight-line method over an estimated useful life of 10 years, with $5000 salvage value. At the beginning of year 9, the company paid $15,000 to overhaul the machine. As a result of this expenditure, the company estimated that the remaining useful life of the machine was now 8 years with no salvage value. What should be the depreciation expense recorded for this machine in Year 9 and what is the asset's December 31, Year 9 net book value?