Dimitrov Corporation, a company that produces and sells a single product, has provided its contribution format income statement for July.

Sales (8,100 units)	$453,600
Variable expenses	291,600
Contribution margin	162,000
Fixed expenses	103,500
Net operating income	$58,500

If the company sells 8,000 units, its net operating income should be closest to:

$54,000

$56,500

$57,979

$58,500

Just need the answer. Thank you.