Additionally, any videos showing multiple paths to the same result are helpful, I find, to understand when one technique may be preferred over another. As an example, Curbal recently posted a video taking the previous row using merge, I’ve seen “ExcelIsFun”(?) do the same thing by using the index as an offset reference to the previous row. The second technique seems less memory intensive, but I appreciate seeing both paths to the same outcome. It helps me form a “web” of possible solutions. Videos comparing multiple paths to the same place are helpful; please consider. Thank you :) Curbal video: kzfaq.info/get/bejne/rb6RmMyZ1bWVZ2w.html