The cost of an asset is $1,000,000, and its residual value is $160,000. Estimated useful le of the asset is four years Cakulate depreciation for the first year using the double-declining - balance method of depreciation (Do not round any intermediate calculations, and round your final answer to the nearest dollar) O A $210,000 OB $250,000 OC $420,000 OD. $500,000