ITEMS: ON THE "SOLUTION PROBLEM 3-1" TAB, USING THE DATA ON THE "GIVEN" TAB, COMPUTE THE FOLLOWING A Unit contribution margin. B Contribution margin ratio. C Break-even in dollar sales. If the sales volume increases by 20% with no change in total fixed expenses, what will be the change in net operating income? If the per unit variable production costs increase by 15%, and if fixed selling and administrative expenses increase by 12%, what will be the new break-even point in dollar sales