I am using a form to get a history of suppliers that our company is using and we wanted to know how much money we have spent on them during the year 2001. I have calculated a field called ExtendedPrice which took the unit price * quantity now I want to add up the extended price for the year 2001 and be able to do that for each year. So I guess it is a sort of Year to Date addition. I know there has to be an easy way to do it. I am not sure how to put it in my query or use it as a control source.