In this post we’ll look at how to calculate a running total, using a standard method and an array formula method. We’ll cover the topic of matrix multiplication (take a deep breath, it’s going to be ok!) using the MMULT formula, one of the more exotic, and challenging formulas in Google Sheets.
If you like video tutorials, here’s the one on MMULT:
This is a lesson from my latest, Google Sheets course on Advanced Formulas 30 Day Challenge (it’s free!).