AMOUNT DATA CHANGE PROCESSING SYSTEM

PURPOSE:To change the value of amount data according to prescribed rules with a certain date or time as a border. CONSTITUTION:A time comparison processing part 3 compares time data stored in a time data storage part 2 with reference time read from a time table 6. When the time data are set within a range designated by the reference time as the result of this comparison, an operation processing part 4 performs arithmetic for changing the first amount data according to the rules read from an arithmetic rule table 7. Then, this arithmetic result is written in a second amount data storage part 52.