Excel Trick: Sum a Specific Number of Cells

This video explains how the =SUM and =OFFSET functions can be combined to write a formula that will sum a specific number of cells. This is especially useful when you are working with monthly data, and showing quarterly and annual periods in a financial model. The video also explains why using the =SUM formula for this purpose can lead to errors.
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The template used in the video is available for download: Download Template
What you will learn in this video:
1. Why =SUM() has limitations.
2. How the =OFFSET() function can be used to return arrays.
3. How to effectively use =SUM and =OFFSET together.
4. How to use F9 to audit formulas.
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