Whirly Corporation's contribution format income statement for the most recent month is shown below:

Required:

$($Consider each case independently$)$:

What would be the revised net operating income per month if the sales volume increases by $90$ units?

What would be the revised net operating income per month if the sales volume decreases by $90$ units?

What would be the revised net operating income per month if the sales volume is $6,300$ units?

$\backslash$table$[[1.$ Revised net operating income,$],[2.$ Revised net operating income,$]]$

Revised net operating income