On January 1,2020, the Sarasota SA ledger shows Equipment 42,000 and Accumulated Depreciation-Equipment 11,500. The depreciation resulted from using the straight-line method with a useful life of 10 years and residual value of 3,500. On this date. the company concludes that the equipment has a remaining useful life of only 4 years with the same residual value. Compute the revised annual depreciation