Quick Sum in Google Sheets (More than just adding numbers!)
If you want to quickly analyze numbers on your Google Spreadsheet without using formulas, then you should check out Quick Sum. Quick Sum shows up in the bottom right corner of your spreadsheet when you highlight a selection of cells.
In addition to quick sum, there are also some slightly hidden features available that include average, minimum, maximum, count and count numbers (dependent on your selection).
Create a filter and quickly analyze numbers based on your selection!