You don't explain what that 6000000 represents in terms of your data, records and fields. are you trying to reference two different subtotals that are computed via the same summary field but in two different sub summary parts or something else?
Apologies, been staring at this one for some time!
The 600000 is derived from a different GetSummary and breakfield to that of the other GetSummary and breakfield that I wish to add it to. That makes it tricky because the report isn't sorted by the 600000's breakfield, it's sorted by other breakfields in order to get the details down just right.
In relation to the data in the report in question, it's of a different context, but for the use case, required to be displayed.
I think if I put it simpler, the 600000 is not a part of the found set I'm using to create the list report and I don't really want it to be as it's made up of around 20 separate records each with its own value. I just need to be able to use this particular total on the report, somehow...!