Vintage Weaponry is owned end operated by a craftsman who makes replicas of historic frearms for museums, sportamen, and collectors. He is currently producing so fintlock muskets pec month. Data are as follows: If Virtage expects to sell 40 units per month, how much is his margin of salety expressed in sales revenue? A. $9,000 B. $36,000 C. $27,000 D. $4,700