The calculation method of the 45-day account period is to start from the last day of the month and calculate after 45 days, that is, no matter which day the goods are delivered in the month, the payment period starts from the last day of the month and is paid after 45 days. If the payment for goods is settled for 45 days in June 65438+ 10, the date after 45 days is calculated from the last day of June 65438+ 10, that is, June10/0/24 is the settlement date.