Pacific Company sells only one product for $ 15 per​ unit, variable production costs are $ 5.00 per​ unit, and selling and administrative costs are $ 1.60 per unit. Fixed costs for 10 comma 000 units are $ 5 comma 000. The operating income is​ ________. A. $ 9.50 per unit B. $ 7.90 per unit C. $ 8.40 per unit D. $ 6.60 per unit