Running monthly reports

[sunnyday]

Hi,
Can you give me an example as to how to run monthly reports which have dependent values on each consecutive month.
For example there will be calculated fields for Sum of Costs," count of "fields derived from access queries for the month of Jan, then again for month of Feb, it is exactly the same report as Jan, but it adds up values from month of Jan.And then again values are added from Feb monthly report and added to particular fields to be sumed up for month of March,and the process goes on.
Note : All the fields are exactly same in the monthly reports except that it adds up previous month's particular values into consecutive month.


Thanks in advance

[June7]

You want a year-to-date calculation for each month? See if this helps http://allenbrowne.com/subquery-01.html#YTD