Abstract: A tablet terminal of an information processing apparatus includes: a product price input receiving unit that receives an input of a price for each settlement target product based on an operation of a user; a total amount calculating unit that adds the prices for the respective products received by the product price input receiving unit to calculate a total amount; a total amount displaying unit that displays the total amount in an amount display device as a payment; and a receipt output unit that outputs a receipt printed with settlement information, including specification information of the price for each product received by the price input receiving unit and information of the total amount, from a printer connected through the interface board. The printer, the amount display device, the interface board are stored in a housing. The housing and the tablet terminal are integrally connected to function as one cash register.