Answer and Explanation:
The calculation of the revised net operating income per month in the following cases:
1. The sales volume increases by 50 units.
Sales revenue (8,550 units × $31) $265,050
Less: Variable expenses (8,550 units × $19) $162,450
Contribution margin $102,600
Less: Fixed expenses $55,200
Net operating income $47,400
2. The sales volume decreases by 50 units.
Sales revenue (8,450 units × $31) $261,950
Less: Variable expenses (8,450units × $19) $160,550
Contribution margin $101,400
Less: Fixed expenses $55,200
Net operating income $46,200
3. The sales volume is 7,500 units.
Sales revenue (7,500 units × $31) $232,500
Less: Variable expenses (7,500 units × $19) $142,500
Contribution margin $90,000
Less: Fixed expenses $55,200
Net operating income $34,800
