If a special sales order is accepted for​ 3,000 seats at a price of​ $330 per​ unit, and fixed costs increase by​ $13,000, how would operating income be​ affected? (NOTE: Assume regular sales are not affected by the special​ order.) A. Increase by​ $227,000 B. Increase by​ $77,000 C. Increase by​ $90,000 D. Decrease by​ $77,000