If you’ve ever built a running total in Excel, you’ve probably written something like {=SUM(A$1:A2)} and dragged it down the column again and again. It’s a simple enough approach—until your dataset ...

Excel has formulas for just about everything—XMATCH for finding data, IF for logic, and SUMIF for conditional totals. But you've probably hit a wall if you've ever needed to extract specific patterns ...