4) Wayne Manufacturing Company had the following information for the 2021. b- Contribution margin percentage c- How many units does Wayne Company have to sell to break even? d- How many units does Wayne Company have to sell to make operating income of $55,000 ? e- How many units does Wayne Company have to sell to make operating income of $46,200 ? f- Calculate the operating leverage when expected sale is 60,000 units. g- Calculate the margin of safety in units if expected sale is 70,000 units