Abstract: An input unit adds input data of a charging amount in a storage section which stores transaction data of a settlement target according to data relating to commodity sales. If an input end instruction for the data relating to commodity sales is received, the data stored in the storage section is output to a settlement unit. The settlement unit carries out a settlement processing for a transaction generating a transaction amount calculated according to the data from the input unit on condition that money is received in a payment amount above the transaction amount. If the data from the input unit includes data relating to a charging amount, the settlement unit adds, with a card reader/writer, the charging amount to the balance of electronic money on condition that money is received in the payment amount above the charging amount with a settlement method different from an electronic money settlement method.