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