Hello, I have written an app that keeps track of an undergraduate student for 8 semesters where there are 14 lessons each semester. Each lesson is graded and I would like to have a running average so that I will always know their current total grade average each semester. I have 8 portal pages each with 14 rows with a total of 112 rows. I would like to have a running average of one of the fields (grades) so that each page (semester) starts fresh. Is there a way to average grades on row numbers? ex average grade on portal row number 1-14, 15-28, 29-42, etc...?Thanks!