To reduce the burden on staff in overseas settlement operations. [Solution] The calculation unit calculates the difference between the first total amount, which is the sum of each
invoice amount in the home country, and the second total amount, which is the sum of each
payment amount in the home country. The conversion
processing unit converts the
invoice amount and
payment amount, each converted to the home country, into settlement currency
invoice amount and settlement currency
payment amount based on a predetermined conversion rate for the settlement currency, which is the type of currency used for settlement and has been set in advance with the settlement recipient. The offset confirmation
processing unit calculates the offset difference, which is the difference between the total settlement currency invoice amount and the total settlement currency payment amount. Then, if the
payment schedule data generation unit obtains an offset difference that indicates the total settlement currency invoice amount is larger than the total settlement currency payment amount, it generates
payment schedule data including the offset difference and the home country currency conversion difference.