There is a one-time setup fee per job ordered either through the Snowball console or jobs accessed through JMAPI (API) from the command line service (CLS). Shipping days are not counted towards the included 10 days you are allotted to use the device. You are only charge based on the full days the device is at your physical location and you are not charged for the day the device arrives or the day the device is shipped back to AWS.