aonnoid nnous ua3npoud uaus BE19.13 (LO 4) Sam's Shingle Corporation is considering the purchase of a new automated shingle- cutting machine. The new machine will reduce variable labor costs but will increase depreciation expense. Contribution margin is expected to increase from $200,000 to $240,000. Net income is expected to be the same at $40,000. Compute the degree of operating leverage before and after the purchase of the new equipment. Interpret your results