Porter Corporation has fixed costs of $800,000, variable costs of $45 per unit, and a contribution margin ratio of 25 percent.

a.	Compute the unit sales price and unit contribution margin for the above product.

b.	Compute the sales volume in units required for Porter Corporation to earn an operating income of $400,000.

c.	Compute the dollar sales volume required for Porter Corporation to earn an operating income of $400,000.