Hi there,   I was wondering if someone could help me with some coding. I have a dataset that I need help grouping. The highlighted column (BR_grp) is the required column. This is created by looking at the cumulative sum for "size_total", where a new group is created once the cumulative sum has reached 2.5%. I have also named the groups in "BR_grp" according to the corresponding customer age (it is preferable to have it like this however I am open to other solutions). I have tried creating a counter with multiple arrays etc and nothing seems to work. I did create the variable "cum_size1" which keeps "size_total" variable if the cumulative size is less than 2.5% and 0 for anything greater... maybe that might help? I've attached an excel sheet below. Thank you 🙂     ... View more