I have a database for a shelter that gives food boxes away. Each participant can receive one box per month. They would like a report that would tell them if the people are repeat customers. I currently have a portal setup on each customers page to record when they receive a box. My problem is, I cannot even begin to think of where to start. In theroy, I would like to run a report that would tell if a person received a box each month for what ever two dates I have setup ( I have two global date fields) and tell me if they are at 100% retention rate for that period or what rate they are at. Is this even possible? Any ideas is appreciated.