how do i solve

Sky High Seats manufactures seats for airplanes. The company has the capacity to produce 100 000 as per year but is currently produces and sols 75.000 seats per year. The following information relates to current production of seats: Sale price per unit $430 Variable costs per unit: Manufacturing Marketing and administrative $220 $50 Totalfixed costs Manufacturing $800,000 Marketing and administrative $230,000 If a special sales order is accepted for 3.100 seats at a price of $300 per unit and food costs increase by $10.000,how would operating income be affected? (NOTE Assume regular sales are not affected by the O A. Increase by $83.000 OB. Increase by 303,000 OC. Increase by $230,000 OD. Decrease by $83,000