Hi Rorya, thanks for the response!

Actual worksheet is quite a bit more complex and is still a work in progress. But essentially, as it stands,:

yes, I have 2 columns per month
no, the cumulative data is in the same column (one row above the incremental data).

BUT I am very happy to change the layout - as I said, this is a work in progress, all is flexible.

Does this help?