please explain how I would solve this question.

On January 1, 2021, Gore, Inc. purchased a machine for $2250000 which will be depreciated $225000 per year for financial statement reporting purposes. For income tax reporting Gore elected to expense $250000 and to use straight-line depreciation which will allow a cost recovery deduction of $200000 for 2021. Assume a present and future enacted income tax rate of 20% What amount should be added to Gore's deferred income tax liability for this temporary difference at December 31, 2021? $90000 $50000 $45000 $40000