(TCO B) A cement manufacturer has supplied the following data: Tons of cement produced and sold 220,000 Sales revenue $924,000 Variable manufacturing expense $297,000 Fixed manufacturing expense $280,000 Variable selling and admin expense $165,000 Fixed selling and admin expense $82,000 Net operating income $100,000 Required: a. Calculate the company's unit contribution margin b. Calculate the company's unit contribution ratio c. If the company increases its unit sales volume by 5% without increasing its fixed expenses, what would the company's net operating income be? (Points : 25)