Quote Originally Posted by Dahonu View Post
...I need to subtract a point after 3 months.
Does this mean that any point assessed is dropped 3 months from the day it was assessed? So you don't really mean "a point"? For example, if there was a no-show on June 15, there are 5 points on the record until September 15. Is that right?

Putting your data on a different sheet for each month makes this more difficult. Are you locked into this format? It would be much better to have all data on a single sheet.