Blanton Company bought equipment on January 1, 2013, with a cost of $160,000, an estimated residual value of $40,000, and estimated the of 15 years. It was depreciated by the straight-line method for four years. Due to obsolescence: it was determined at the beginning of 2017 that the use should be shared by the years and the residual value changed to rero. What is the accumulated depreciation at the end of 20167 a. S000 Ob 13.000 O s. Od: 347.007