Sales $ 450,000 100% $ 150,000 100% $ 300,000 100% Variable expenses 225,000 50% 45,000 30% 180,000 60% Contribution margin 225,000 50% 105,000 70% 120,000 40% Traceable fixed expenses 126,000 28% 78,000 52% 48,000 16% Office segment margin 99,000 22% $ 27,000 18% $ 72,000 24% Common fixed expenses not traceable to offices 63,000 14% Net operating income $ 36,000 8% Exercise 7-16 Part 3 (Static) Working with a Segmented Income Statement; Break-Even Analysis [LO7-4, LO7-5] 3. Assume that sale