On January 1,2022 , the Grouper Company ledger shows Equipment $30,720 and Accumulated Depreciation $8,640. The depreciation resulted from using the straight-line method with a useful life of 10 years and a salvage value of $1,920. On this date, the company concludes that the equipment has a remaining useful life of only 4 years with the same salvage value. Compute the revised annual depreciation. Revised annual depreciation