On January 1, 2010, the Ramirez Company ledger shows Equipment $32,000 and Accumulated Depreciation $11,000. The depreciation resulted from using the straight-line method with a useful life of 10 years and salvage value of $1,800. 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.