Hello! A company that sells umbrellas has sales of $750,000. (60,000 units x $12.50) Variable costs are 6.00/unit and total fixed costs = $295,525.00. Contribution margin per unit = $6.50, contribution margin is $390,000. Operating income is $94,475.00 with an operating leverage of 4.13. The company wants to increase sales by 20%. How would I calculate the percentage of before income tax for this increase?