Raner, Harris & Chan is a consulting firm that specializes in information systems for medical and dental clinics. The firm has two offices--one in Chicago and one in Minneapolis. The firm classifies the direct costs of consulting jobs as variable costs. A contribution format segmented income statement for the company's most recent year is given: Office Total Company Chicago Minneapolis Sales $450,000 Variable expenses 225,000 100% 50% $ 150,000 45,000 100% 30% $ 300,000 100% 180,000 60% Contribution margin 225,000 50% 105,000 70% 120,000 40% Traceable fixed expenses 126,000 28% Office segment margin Common fixed expenses not traceable to offices 78,000 52% 99,000 22% $ 27,000 18% 63,000 14% 48,000 16% $ 72,000 24% Net operating income $ 36,000 8% 2. By how much would the company's net operating income increase if Minneapolis increased its sales by $75,000 per year? Assume no change in cost behavior patterns. Net operating income increase