B D F H K L M N 1 2 3 4 Norman Corporation produces and sells a single product. The unit selling price is $150 and variable expense per unit is $42. Total foed expenses are $421,200. Determine the unit sales needed to earn a target profit of $21,600. Determine the dollar sales needed to earn a target profit of $54,000 Calculate the margin of safety in dollars for each target profit amount above If the unit sales are 4,000 units, what is the degree of operating leverage