A tile manufacturer has supplied the following data.

Boxes of tile produced and sold	625,000
Sales revenue	$2,975,000
Variable manufacturing expense	$1,720,000
Fixed manufacturing expense	$790,000
Variable selling and admin expense	$152,000
Fixed selling and admin expense	$133,000
Net operating income	$180,000

Required: Calculate the company's unit contribution margin. Calculate the company's contribution margin ratio. If the company increases its unit sales volume by 5% without increasing its fixed expenses, what would the company's net operating income be?