Step-by-step explanation:
a. The computation of the operating leverage is shown below:
As we know that
Degree of operating leverage = Contribution margin ÷ Net income
For Armstrong Company, it is
= $258,000 ÷ $95,000
= 2.715
For Contador Company, it is
= $456,000 ÷ $95,000
= 4.80
b. Now the variable costing income statement is
For Armstrong Company
Sales ($505,000 × 110%) $555,500
Less: Variable cost ($247,000 × 110%) ($271,700)
Contribution margin $283,800
Less: Fixed cost ($163,000)
Net income $120,800
For Contador Company
Sales ($505,000 × 110%) $555,500
Less: Variable cost ($49,000 × 110%) ($53,900)
Contribution margin $501,600
Less: Fixed cost ($361,000)
Net income $140,600