The Operations Manager for Alpha Loan and Saving orders cash from her home office for her very popular "Alpha Regent" automated teller machine, which only dispenses $100 bills. She estimates that this machine dispenses an average of 15530 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 7 days. Assuming a 30-day month, at what point should bills be reordered (ROP)