If you are new to Excel or you want to work more efficiently, try these tips for using Autosum.
Let's start with some basics.
If you just want a quick view of a running total, select the numbers and look in the bottom right corner of your screen.
For numbers that will stay in place, you can:
Use the Autosum key on the Home tab or the Formula tab (or add it to the Quick Access toolbar)
Use the Quick Analysis tools on the bottom right corner of a selected cell group (or press CTRL+Q)
Make a table (Ctrl+T) and click table rows on the Table Design tool.