A local service station is opened 7 days per week, every day of the year. Sale of its premium grade oil is 40 cans per day, with a standard deviation of 9.15, and each can of oil costs $15. The service station reviews its inventory every Monday when a supply sales representative arrives. Assuming the station owner wants a 99.5% service probability and the lead time for delivery is 3 days, how many cans of oil should the service station order, if there are currently 55 cans of oil on the shelf?

Q: to = (Round to two decimal places as needed.)

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