Exercise 5-1 The Effect of Changes in Activity on Net Operating Income [LO5-1] Whirly Corporation’s contribution format income statement for the most recent month is shown below: Total Per Unit Sales (7,200 units) $ 237,600 $ 33.00 Variable expenses 136,800 19.00 Contribution margin 100,800 $ 14.00 Fixed expenses 54,900 Net operating income $ 45,900 Required: (Consider each case independently): 1. What would be the revised net operating income per month if the sales volume increases by 40 units? 2. What would be the revised net operating income per month if the sales volume decreases by 40 units? 3. What would be the revised net operating income per month if the sales volume is 6,200 units?

See the explanation.

Explanation:

Requirement 1

New sales volume after increasing 40 units = (7,200 + 40) = 7,240 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 (7,240 × 33) = $ 237,600 (Note - 1)

Less: Variable expense (7,240 × 19) = 136,800 (Note - 2)

Contribution Margin = $100,800

Less: Fixed Expense  $54,900

Net Operating Income $45,900

Note 1: Sale price per unit $237,600 ÷ 7,200 = $35

Note 2: Variable expense per unit $136,800 ÷ 7,200 = $20

Requirement 2

From requirement 1 we get,

Sale price per unit = $33

Variable expense per unit = $19

New sales volume after decreasing 40 units = (7,200 - 40) = 7,160 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 (7,160 × 33) = $236,280

Less: Variable expense (7,160 × 19) = $136,040

Contribution Margin = $100,240

Less: Fixed Expense  $54,900

Net Operating Income $45,340

Requirement 3

From requirement 1 we get

Sale price per unit = $33

Variable expense per unit = $19

If the sales volume is 6,200 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 (6,200 × 33) = $204,600

Less: Variable expense (6,200 × 19) = $117,800

Contribution Margin = $86,800

Less: Fixed Expense  $54,900

Net Operating Income           $31,900

If the company sells 6,200 units, the company can still make a profit.