I am quite confused about the average balance calculation.
If my bank account shows something like the following,
April 22 nd , 2017 – May 22 nd , 2017: $ 120 (closing balance on May 22 nd , 2017)
March 22 nd , 2017 – April 22 nd , 2017 : $ 120 (closing balance on April 22 nd , 2017)
...