Miller Company$$s contribution format income statement for the most recent month is shown below:

Total Per Unit

Sales $(43,000$ units$)$ $ $387,000$ $ $9\mathrm{.}00$

Variable expenses $258,0006\mathrm{.}00$

Contribution margin $129,000$ $ $3\mathrm{.}00$

Fixed expenses $44,000$

Net operating income $ $85,000$

Required:

$($Consider each case independently$)$:

What is the revised net operating income if unit sales increase by $13\%?$

What is the revised net operating income if the selling price decreases by $$1\mathrm{.}50$ per unit and the number of units sold increases by $19\%?$

What is the revised net operating income if the selling price increases by $$1\mathrm{.}50$ per unit, fixed expenses increase by $$8,000,$ and the number of units sold decreases by $7\%?$

What is the revised net operating income if the selling price per unit increases by $10\%,$ variable expenses increase by $40$ cents per unit, and the number of units sold decreases by $14\%?$