Whirly Corporation’s contribution format income statement for the most recent month is shown below: Total Per Unit Sales (10,000 units) $ 350,000 $ 35.00 Variable expenses 200,000 20.00 Contribution margin 150,000 $ 15.00 Fixed expenses 135,000 Net operating income $ 15,000 Required: (Consider each case independently): 1. What would be the revised net operating income per month if the sales volume increases by 100 units? 2. What would be the revised net operating income per month if the sales volume decreases by 100 units? 3. What would be the revised net operating income per month if the sales volume is 9,000 units?

See explanation section.

Explanation:

Requirement 1

New sales volume after increasing 100 units = (10,000 + 100) = 10,100 units. The revised net operating income is calculated as follows

                           Whirly Corporation’s

               Contribution format income statement

               For the year ended December 31 20YY

Sales Revenue (10,100 × 35) = 353,500 (Note - 1)

Less: Variable expense (10,100 × 20) = 202,000 (Note - 2)

Contribution Margin = $151,500

Less: Fixed Expense  $135,000

Net Operating Income $16,500

Note 1: Sale price per unit $350,000 ÷ 10,000 = $35

Note 2: Variable expense per unit $200,000 ÷ 10,000 = $20

Requirement 2

From requirement 1 we get,

Sale price per unit = $35

Variable expense per unit = $20

New sales volume after decreasing 100 units = (10,000 - 100) = 9,900 units. The revised net operating income is calculated as follows

                            Whirly Corporation’s

               Contribution format income statement

               For the year ended December 31 20YY

Sales Revenue (9,900 × 35) = 346,500

Less: Variable expense (9,900 × 20) = 198,000

Contribution Margin = $148,500

Less: Fixed Expense  $135,000

Net Operating Income $13,500

Requirement 3

From requirement 1 we get

Sale price per unit = $35

Variable expense per unit = $20

If the sales volume is 9,000 units, the revised net operating income is calculated as follows

                         Whirly Corporation’s

               Contribution format income statement

               For the year ended December 31 20YY

Sales Revenue (9,000 × 35) = $315,000

Less: Variable expense (9,000 × 20) = $180,000

Contribution Margin = $135,000

Less: Fixed Expense  $135,000

Net Operating Income           $0

If the company sells 9000 units, there will be no loss, no profit.

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