You would like to add the column numbers through excel or any other spreadsheet file. You would like to compute the cells immediately. The best option available is to use the AutoSum button located at the standard toolbar. Click on the cells that you want to add and click on the AutoSum button. Just press enter to get your answer. You will get the answer to the numbers you would like to add up immediately.
This is faster as compared to putting in the information one by one which is another option to add numbers through your spreadsheet. This can be very complicated and time-consuming. You also have to repeat what you are doing if you make a mistake.
The fastest way to add up column numbers is to click in the cell below the numbers and then click the AutoSum button on the standard toolbar, then press enter.