3. Due to an increase in demand, the company estimates that sales will increase by $51,000 during the next year By how much should net operating income increase (or net loss decrease) assuming that fxed expenses do not change? 4. Assume that the operating results for last year were $ 3,000,000 1,500,000 1,500,000 180,000 $ 1,320000 Sales Variable expenses Contribution margin Fixed expenses a. Compute the degree of operating leverage at the current levei of sales, Round your answer to 2 decimal places.) gree of operat