| 摘要 |
<p>An operation unit price is obtained based on a second database in which information on a customer is stored and a third database in which information on an operation unit price specified for each operator organization to which an operator belongs and for each content of the operation performed by the operator is stored. A fourth database in which information on an operation cost to be paid to the operation organization by the gas supplier is stored is updated based on a first database in which information on the operator is stored and the operation unit price obtained. The operation costs are totalized based on the fourth database. The operation cost is totalized.</p> |
