Cullumber Company purchased a new machine on October $1,2025,$ at a cost of $$66,000.$ The company estimated that the machine has a salvage value of $$6,960.$ The machine is expected to be used for $72,000$ working hours during its $6-$year life. Compute the depreciation expense under the straight$-$line method for $2025$ and $2026,$ assuming a December $31$ year$-$end. $20252026$ Depreciation expense under the straight$-$line method