Onslow co. purchased a used machine for $192,000 cash on january 2. on january 3, onslow paid $8,000 to wire electricity to the machine and an additional $1,600 to secure it in place. the machine will be used for six years and have a $23,040 salvage value. straight-line depreciation is used. on december 31, at the end of its fifth year in operations, it is disposed of. 2. prepare journal entries to record depreciation of the machine at december 31.