You'll have to do something like this (you'll probably have to tweak this, and Brian may have a better answer...).

 

Shared Numbervar Total1;

//Initialize at start of report

If previousIsNull({table.some key field}) then Total1 := 0; 

 

Create a similar formula for Total2.  Create another formula to add them together.

 

Shared Numbervar Total1;

Total1 := Total1 + <whatever you need to do to get Total1>

 

Do the same sort of thing with Total2 and Subreport 2.

 

In order to get the correct result, you'll probably have to put your formula that adds Total1 and Total2 in a group or report footer.

 

-Dell