Blanton Company bought equipment on January 1, 2010 with a cost of $160,000, an estimated residual value of $40,000, and an estimated life of 15 years was depreciated by the straight-line method for 4 years. Due to obsolescence, it was determined at the beginning of 2014 that the useful life should be shortened by 3 years and the residual value changed to zero. What is the accumulated depreciation at the end of 2013?