A manufacturer of cedar shingles has supplied the following data: Bundles of cedar shakes produced and sold Sales revenue Variable manufacturing expense Fixed manufacturing expense Variable selling and administrative expense Fixed selling and administrative expense Net operating income 360,000 $ 2,412,000 $ 1,170,000 $ 714,000 $ 414,000 $ 82,000 $ 32,000 The company's degree of operating leverage is closest to