Four independent situations are described below. Each involves future deductible amounts and/or future taxable amounts produced by temporary differences reported first on:

	Income Statement		Tax Return
	Revenue	Expense	Revenue	Expense
(1.)	$20,000
(2.)			$20,000
(3.)	$15,000	$20,000
(4.)	$15,000	$20,000		$10,000

Required: For each situation, determine the taxable income assuming pretax accounting income is $100,000. Show ALL calculations.