What is contribution margin when 475,000 units are sold? Units Sales revenue Variable manufacturing expense Fixed manufacturing expense Variable selling and administrative expense Fixed selling and administrative expense net operating income 450,000 $2,812,500 $875,000 $266,000 $452,500 $232,000 $987,000 OA. $1,401,250 B. $1,567,500 c. $1,485,000 D. $2,968,750