SUSIUTLULUSH OUSTOS Calculator Equipment with a cost of $76,440, an estimated residual value of $3,640, and an estimated life of 14 years was depreciated by the straight-line method for 5 years. Due to obsolescence, it was determined that the remaining useful life should be shortened by 5 years and the residual value changed to zero. The depreciation expense for the current and future years is a. $3,603 b. $5,044 c. $12,610 d. $26,000