Payables and receivables
(2) Payables and receivables. References in this paragraph (b)(2)(iv) and paragraph (b)(4)(i) of this section to book and tax depreciation, depletion, amortization, and gain or loss with respect to property that has an adjusted tax basis that differs from book value include, under analogous rules and principles, the unrealized income or deduction with respect to accounts receivable, accounts payable, and other accrued but unpaid items.