Step-by-step explanation:
a. The presentation of given question is shown below: -
Degree of operating leverage = Contribution margin ÷ Net income
Armstrong Company
= $257,000 ÷ $98,000
= 2.62 2
Contador Company
= $453,000 ÷ $98,000
= 4.622
b. Income statement of Variable costing is
Armstrong Company
Sales ($499,000 × 110%) $548,900
Less: Variable cost
($242,000 × 110%) ($266,200)
Contribution margin $282,700
Less: Fixed cost ($159,000)
Net income $132,700
Contador Company
Sales
($499,000 × 110%) $548,900
Less: Variable cost
($46,000 × 110%) ($50,600)
Contribution margin $498,300
Less: Fixed cost ($355,000)
Net income $143,300