On January 1, 2021, the Accumulated Depreciation-Machinery account of a particular company showed a balance of $370,000. At the end of 2021, after the adjusting entries were posted, it showed a balance of $395,000. During 2021, one of the machines which cost $125,000 was sold for $60,500 cash. This resulted in a loss of $7,500. Assuming that no other assets were disposed of during the year, how much was depreciation expense for 2021?