George's Shingle Corporation is considering the purchase of a new automated shingle-cutting machine. The new machine will reduce variable labour costs but will increase depreciation expense. The contribution margin is expected to increase from $132,000 to $220,000. Operating income is expected to be the same at $44,000. (a1) Calculate the degree of operating leverage before and after the purchase of the new equipment. (Round answers to O decimal places, e.g. 125.) Before the purchase After the purchase Operating leverag