Answer:
increase by $11,000
Step-by-step explanation:
The computation of net operating income is shown below:-
Revenue = Sales per unit × Sales price per unit
= 3,000 × $70
= $210,000
Less variable costs = Sales per unit × Variable cost per unit
= 3,000 × $50
= $150,000
Fixed costs = $25,000
Net income = Revenue - Less variable costs - Fixed costs
= $210,000 - $150,000 - $25,000
= $35,000
Contribution margin per units = $70 - $50
= $20
Increase by 10%, it will be
$20 × (1 + 0.1)
= $22
If it decrease by 20%
= $25,000 × (1 - 0.20)
= $20,000
Net income = $3,000 × 22 - 20,000
= 46,000
So it was 35,000, with the changes it is 46,000. That increase by $11,000