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Excel Countif and Sumif - Excel tutorial
Great Excel function tutorial covering Count, CountIf, Sum, SumIf, and SumProduct.
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Formulas and Functions Techniques
Formulas and functions provide the logic that powers spreadsheets.
Formulas in Excel
This tutorial will teaches you how to use Formulas in Excel.
Validate Data Based on a List on Another Worksheet
This tutorial provides two methods you can use to validate data based on a list on another worksheet. The first method takes advantage of Excel's named ranges, and the second uses a function call.
GROUP and UNGROUP in Excel
Learn how to group and ungroup rows and columns so that you can easily hide or unhide the rows and columns you are interested in.
The Basics of Spreadsheets: Numbers, Labels, and Formulas
In this tutorial you will learn about the basics of Spreadsheets: Numbers, Labels and Formulas.