Confirm your calculations in Requirement 3 above by increasing the unit sales in your worksheet by 20% so that the Data area looks ke this: A B C 1 Chapter 6: Applying Excel 2 3 Data 4 Unit sales 96,000 units 5 Selling price per unit 60 per unit 6 Variable expenses per unit 42 per unit 7 Fixed expenses _(1,152,000) a) What is net operating income? (Negative amount should be indicated by a minus sign.) Net operating income (loss) $576,000 b) By what percentage did the net operating income increase? Percentage increase in net operating income 50%