Final answer:
The AutoSum command is found on the Home tab under the Editing group in Microsoft Excel and is used to quickly add up a range of numbers.
Step-by-step explanation:
The correct answer to the question of where the AutoSum command is found is that the AutoSum command is located on the Home tab under the Editing group in Microsoft Excel. The AutoSum feature quickly adds a range of numbers together either in a row or a column by automatically entering the sum function. When you click on the AutoSum button, Excel will guess the range you want to add based on the numbers surrounding the cell where you are trying to insert the sum.