Whirly Carpotatian's contribution format income statemtni for the most recent month is ahown below. Requitred Feontidet esch cate independentyy 1. What would be the revised net opereting income per inionth if the sales volume increases by 40 uitits? 2. What would bes. the revised net operating income per month if the sales voilime decreates by ito timiti?l 3 What would be the revised net opereting income per thonth it the sales valume is. 7900 units?]