We need to identify the due date such as the solution is shown below: June 8 we have 6/30 days which is equal to 22 days July we have 31 days August we have 31 days September is 30 days Then, we have 22 + 31 + 31 + 30 and the total is 114 days plus 6 days (si). Therefore, the answer is 120 days.