Parmar Cleaning Services purchased equipment for $65,000 on January 2, 2011. Management estimated the equipment would have a useful life of seven years and a residual value of $5,500. On January 3, 2014, the equipment was upgraded at a cost of $10,200. After the upgrade, management estimates that the equipment will now have a total useful life of nine years and a residual value of $3,200. The company uses straight-line depreciation and has a December 31 fiscal year end. Calculate annual depreciation expense for 2011 through 2014.