The Fastest Way to Sum Columns in Excel
The sum function is probably the most common function used in Microsoft Excel. This video will show you the quickest to use that function on a single column by using the Sum button on the home ribbon.
You could use the SUM formula (or even the SUBTOTAL formula) but why waste all those keystrokes and mouse clicks writing a function when a single button click on your home ribbon is the fastest way to sum a column?
And this Excel tutorial does it all in just over 30 seconds - The fastest tutorial on the whole internet! (Don't fact check that.)