How to Create an AutoSum Formula in Office Excel For Mac
Creating an AutoSum formula
One of the most common formulas you'll create in Excel is a formula that finds the sum of a column of numbers. Excel enables you to create these formulas, called AutoSum formulas, with just a few clicks of the mouse. Creating an AutoSum formula that finds the sum of a series of values is simply a matter of clicking the cell directly below of the values and then, on the toolbar, clicking the AutoSum button. So, I will do that. I have a set of values here that I want to add, from C4 to C15. I've selected cell C16, and I'll go up to the toolbar and click the AutoSum button.
When I do, Excel creates my formula, C3:C15. Press Return, and there is my value. The problem is there is a little mistake, and it can make a very big difference, depending upon the data you're working with. Let's look at that formula again. It finds the value, as you can see here on the formula bar, the sum of all the values in C3:C15. I wanted C4:C15. Now, why did that happen? That's because the year in cell C3 is treated as a value.
When you create an AutoSum formula, you need to make sure that the only numerical values in your column are the ones that you want to summarize in your calculation. So, for example, if I want to exclude the value in C3 from this calculation, the easiest way to do it is, before I even create the formula, change it to something like CY2008, CY2009, or CY2010. Now, this AutoSum formula doesn't change. It just wrote the formula, and it's not something that keeps checking to see where the numbers are.
Instead, if I delete it and then click the AutoSum button again, Excel creates the formula properly, finding the data C4:C15. When I press Return, I get the correct value. You probably noticed that the AutoSum button has a down arrow at its right edge. You can use the AutoSum button's down arrow to create formulas using functions other than Sum. So, let's say for 2009 I wanted to find the average monthly revenue. For that, I click cell D16, and I won't have the possibility of an error, because I now have CY, or Calendar Year 2009.
When I go up to the AutoSum button, I click the down arrow and I click Average. Excel creates the formula Average D4:D15, which I can accept by pressing Return, and I see the average value. Same thing for CY2010. I can click the AutoSum button's down arrow, and I can either select any of these items, or if I want to select another function, I can go to the function library by clicking More Functions.
In this case, I will just find the minimum value, or the lowest value, by clicking min. I have Min E4:E15. Press Return, and I see that the lowest value is 200,757. Creating AutoSum formulas quickly helps you summarize your data efficiently and get on with the more demanding tasks facing you in your workbook. Don't forget that you're not limited to the Sum function. You can select any function you like from the AutoSum button's down arrow list.
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