Falcon Co. produces a single product. Its normal selling price is $30 per unit. The variable costs are $15 per unit. Fixed costs are $21,000 for a normal production run of 5,000 units per month. Falcon received a request for a special order that would not interfere with normal sales. The order was for 1,360 units with a special price of $21 per unit. Falcon has the capacity to handle the special order, and for this order, a variable selling cost of $2 per unit would be eliminated. If the order is accepted, the differential effect on profit would be a(n) a. increase of $14,144 b. increase of $10,880 c. decrease of $6,528 d. increase of $8,704