Crystal Reports 11.5

-Using a crosstab and a running total.
-I have a date selector parameter (date_from - date_to)

If for each month there is one 1 new record created, and since there is a running total, the month amount grows exponential by 1 each time:

Jan Feb Mar Apr May Jun
1    2    3    4    5    6

However, if I run a report from May – Jun, my results would display:

May Jun
1   2

Is it possible to run a date span; display only the months you specify; but keep the running total from numbers which are not displayed?:

May Jun
5   6

Thanks for the reply.
Unfortunately, it is a little more complicated. My example was more of an analogy.

In a nutshell:

Our data in our SQL database has records going back to June 01, 2008.

When we run the report (with a parameter) from July 1, 2008 to Dec 1, 2008 we still want the records in June to be carried over into the July total (even though June is not in the parameter)

To summarize: if June has 5 records, and July has 100 records, and we run the date range parameter is from June 1, 2008 to Dec 1, 2008, we want the records from June to be added to the July total.

So even though June is not being displayed in a column in the crosstab, we want its value to be carried over.