On January 1, 2012, the Accumulated Depreciation Machinery account of a particular company showed a balance of $740,000. At the end of 2012, after the adjusting entries were posted, it showed a balance of $790,000. During 2012, one of the machines which cost $250,000 was sold for $121,000 cash. This resulted in a loss of $8,000. Assuming that no other assets were disposed of during the year, how much was depreciation expense for 2012? Be detailed in your response and provide examples also.