Oriole Company Purchased A Depreciable Asset For $837900 On January 1, 2018. The Estimated Salvage Value Is $81000, And The Estimated Total Useful Life is 9 years. The straight-line method is used for depreciation. In 2021, Oriole changed its estimates to a total useful life of 5 years with a salvage value of $143000. What is 2021 depreciation expense?

a. $252300
b. $584100
c. $139650
d. $221300