EXERCISE 5-1 The Effect of Changes in Sales Volume on Net Operating Income Los Whirly Corporation's contribution format income statement for the most recent inonth is shown below: Total Per Unit Sales (10,000 units) $350,000 $35.00 Variable expenses 200.000 20.00 Contribution margin 150.000 $15.00 Fixed expenses 135.000 Net operating income S 15.000 Reguired: convenience bendent I was een perhit the sale ole mense by 100 nits per income per if the best decicuchy is VIEWS the sales me 9000