A manufacturer has supplied the following data: Units produced and sold Sales price per unit Variable manufacturing expense per unit Total fixed manufacturing expense Variable selling and administrative expense per unit Total fixed selling and administrative expense S $ $ $ $ 380,000 7.20 3.50 336,000 1.50 372,000 The company's degree of operating leverage is closest to: a. 6.53 b. 0.153 c. 3.53 d. 2.47