Vintage Weaponry is owned and operated by a craftsman who makes replicas of historic firearms for museums, sportsmen, and collectors. He is currently producing 80 flintlock muskets per month. Data are as follows: Sales price per unit Variable cost per unit Fixed costs per month $800 $700 $3,400 If Vintage expects to sell 60 units per month, how much is his margin of safety expressed in sales revenue? OA. $20,800 B. $18,200 OC. $27,200 OD. $48,000