A store terminal executes a process including a step S500 for determining whether or not to receive the allocation fee and a step S502 for determining whether or not there is a request for termination of use, and further including, when the allocation fee is received (YES in S500) and it is determined that there is a request for termination of use (YES in S502), a step S504 for acquiring a usage time, a step S506 for setting a discount amount, a step S508 for setting a usage fee, and a step S510 for executing a checkout process.