alculator Computer equipment was acquired at the beginning of the year at a cost of $55,200. It had an estimated residual value of $3,000 and an estimated useful life of five years. Determine the (a) depreciable cost, (b) straight-line rate, and (c) annual straight-line depreciation. a. Depreciable cost b. Straight-line rate 10,440 % c. Annual straight-line depreciation