Enter this new data into your worksheet. Make sure that you change all of the data that are different not just the sales. Print or copy the income statements from your worksheet What happened to the variable costs and to the fixed costs when sales increased by 10% Why? Did the contribution margin increase by 10? Why or why not? Did the net operating income increase by 10%? Why or why not? Enter this new data into your worksheet. Make sure that you change all of the data that are different not just the sales. Print or copy the income statements from your worksheet What happened to the variable costs and to the fixed costs when sales increased by 10% Why? Did the contribution margin increase by 10? Why or why not? Did the net operating income increase by 10%? Why or why not