Tab 10 A cement manufacturer has supplied the following data: Tons of cement produced and sold Sales revenue Variable manufacturing expense Fixed manufacturing expense Variable selling and administrative expense Fixed selling and administrative expense Net operating income 220,000 $924,000 $297,000 $280,000 $165,000 $82,000 $100,000 What is the company's unit contribution margin? The company's contribution margin ratio is closest to: If the company increases its unit sales volume by 5% without increasing its fixed expenses, then total net operating income should be closest to