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

Required:

$($Consider each case independently$)$:

What is the revised net operating income if unit sales increase by $16\%?$

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 $21\%?$

What is the revised net operating income if the selling price increases by $$1\mathrm{.}50$ per unit, fixed expenses increase by $$10,000,$

and the number of units sold decreases by $7\%?$

What is the revised net operating income if the selling price per unit increases by $20\%,$ variable expenses increase by $30$

cents per unit, and the number of units sold decreases by $9\%?$