we are looking for a way to pull a list of our current major donors- anyone who has given $1200+ within ANY given 12 month period (including cumulatively). Is there any way to make a query that we can run once a month to see who has reached that amount- I’m afraid we’re missing people if we just do by calendar year, previous year, etc. They could overlap these time periods (for ex. a $600 donation in Dec. 2013 and a $600 donation in November 2014 would make them a major donor for us). Is there any way to do this?