Hello,
I have an easy issue but anyway I cannot find easy solution. Perhaps you could help me find the best way.
I have a list of sth which are listed in rows. Some of those row values have to be further summarize to the following rows according to mapping available in column (aggregate to row) but that process continues several times ie ->summarized values to row 4-> together with others rows to row 2 then add some more to row 1. I real life it continues a couple more times. In the end I would like to have a list with unique rows and values which were summarized along the way. Example below (left table before, right after). How to create a summarize with a loop?

Thank you!