361. The daily rate is invoiced every month, before the beginning of the month, at 30 times its amount, to fix the monthly rate payable by the adult. If the accommodation period is less than 30 days, the rate shall be invoiced pro rata to the days of stay which remain.The day from which the contribution is or becomes payable is considered a day of stay but that on which the beneficiary leaves is not counted. Periods of temporary discharge from a hospital centre or a reception centre are counted as days of stay.