Answer:
40% and $400
Step-by-step explanation:
For computing the change in net operating income, first we have to determine the contribution margin ratio which is shown below:
Contribution margin per unit = Selling price per unit - Variable expense per unit
= $4 -$2.4
=$1.6
And, Contribution margin ratio = (Contribution margin per unit) ÷ (selling price per unit) × 100
So, the Profit volume ratio = (1.6) ÷ (4) × 100 = 40%
Since the sale is increased by $1,000, so the change would be
= $1,000 × 40%
= $400