Reference · Answers
Why is a 10-week charge not a monthly charge?
answersChecked Oct 23, 2026
No record in this edition publishes a 70-day interval; every verified interval is a calendar month. The arithmetic still matters because a 10-week interval is the most common trap in the category: a 70-day charge recurs about 5.21 times a year, so the monthly equivalent is the charge multiplied by 365.25, divided by 12, divided by 70.
No record in this edition publishes a 70-day interval; every verified interval is a calendar month. The arithmetic still matters because a 10-week interval is the most common trap in the category: a 70-day charge recurs about 5.21 times a year, so the monthly equivalent is the charge multiplied by 365.25, divided by 12, divided by 70.