original answer

Equipment with a cost of $57,330, an estimated residual value of $2,730, and an estimated life of 13 years was depreciated by the straight-line method for 7 years. Due to obsolescence, it was determined that the remaining useful life should be shortened by 3 years and the residual value changed to zero. The depreciation expense for the current and future vears is a. 52,148 b. 59130 c. 52.793 d. 529,400