PLEASE SHOW ALL WORK AND EXPLAIN, THANK YOU

Due to an error in computing depreciation expense, Hadley Corporation understated accumulated depreciation by $86,900 as of December 31, 2016. Hadley has a tax rate of 30%. Indicate whether Hadley's assets as of December 31, 2016, would be overstated (O) or understated (U) and by what amount? Answer with the amount and either a O or U right beside the amount no space. Example: if your answer is $1,000 overstated put 1,000O