The Gasson Company sells three products, Product A, Product B and Product C, and had sales of $1,000,000 during the month of June. The company's overall contribution margin ratio was 37% and fixed expenses totaled $350,000. Sales were: Product A, $500,000; Product B, $300,000; and Product C, $200,000. Traceable fixed costs were: Product A, $120,000; Product B, $100,000; and Product C, $60,000. The variable expenses of Product A were $300,000 and the variable expenses of Product B were $180,000. The net operating income for the company as a whole for June was: a. $20,000 b. $90,000 c. $170,000 d. $300,000