Porschia is considering the acquisition of new machinery that will produce uniform benefits over the next 9 years. The following information is available:

Annual savings in cash operating costs: $490,000 Annual depreciation expense: $390,000

If the company is subject to a 30% tax rate, what denominator should be used to compute the machinery's payback period?

	$343,000.
	$460,000.
	$170,000.
	$70,000.
	None of these.