The manager of a credit union orders cash for her branch's automated teller machine, which only dispenses $100 bills. she estimates that this machine dispenses an average of 12,500 bills per month, and that carrying a bill in inventory costs 10 percent of its value annually. she knows that each order for these bills costs $300 for clerical and armored car delivery costs, and that order lead time is six days. assuming a 30-day month, if she were to order 6,000 bills at a time, what would be the average monthly total costs, excluding the value of the bills?