On its year 1 financial statements, Seatax Corporation, an accrual-method taxpayer, reported federal income tax expense of $570,000. On its year 1 tax return, it reported a tax liability of $650,000. During year 1, Seatax made estimated tax payments of $700,000. What book-tax difference, if any, associated with its federal income tax expense should Seatax have reported when computing its year 1 taxable income? Is the difference favorable or unfavorable? Is it temporary or permanent?