There might be some numbers you're missing when summing it up.

Have you ever thought of the humble SUM function as a secret weapon for advanced analytics? Most Excel users see it as a basic tool for adding numbers, but what if I told you it could do so much more?

You’ve probably used SUM a thousand times. Everyone has. SUM is fine for school assignments and tiny tables, but in the real world, it’s a blunt instrument. If you want totals you can actually trust, ...