Mathias Corporation manufactures and sells wire rakes. The rakes sell for $20 each. Information about the companys costs is as follows:

Variable manufacturing cost per unit	$9
Variable selling and administrative cost per unit	$4
Fixed manufacturing overhead per month	$250,000
Fixed selling and administrative cost per month	$350,000

a. Determine the companys monthly break-even point in units. b. Determine the sales volume (in dollars) required for a monthly operating income of $100,000. c. Estimate the amount by which monthly operating income will increase if the company anticipates a $200,000 increase in monthly sales volume.