Miller Company's contribution format income statement for the most recent

month is shown below:

Required:

$($Consider each of the four requirements independently$)$:

Assume the sales volume increases by $4,320$ units:

a$.$ What is the revised net operating income?

b$.$ What is the percent increase in unit sales?

c$.$ Using the most recent month's degree of operating leverage, what is

the percent increase in net operating income?

What is the revised net operating income if the selling price decreases

by $$1\mathrm{.}20$ per unit and the number of units sold increases by $19\%?$

What is the revised net operating income if the selling price increases

by $$1\mathrm{.}20$ per unit, fixed expenses increase by $$9,000,$ and the number of

units sold decreases by $3\%?$

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 $12\%?$