# InfoPath 2010 running total sum in repeating table

Learn how you can use the sum function and preceding XPath axis in formulas to create a running total calculation in a repeating table on an InfoPath 2010 form.

You can use XPath axes such as for example **preceding** and **preceding-sibling** with functions in InfoPath to perform calculations. One such calculation is a running total in a repeating table, where the value of a field in a particular row of the repeating table is the cumulative value of the values of the fields in all of the rows preceding the current row.

The following InfoPath video shows you how you can use the **sum** function together with the **preceding** XPath axis within a formula for a rule or for the **Default Value** of a field in a repeating table control on an InfoPath form to perform a running total calculation within the repeating table and keep the values in the repeating table updated whenever a new row is added or whenever a value is changed within an existing field.

## In this InfoPath 2010 tutorial video, you learned...

- How to use the
**sum**function with the**preceding**XPath axis in a formula. - How to set a field to recalculate itself.
- How to set the
**Default Value**of a field in a repeating table control on an InfoPath form.

See more InfoPath 2010 tutorial videos »

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in any way without an expressed written consent of S.Y.M. Wong-A-Ton. The techniques
demonstrated in this article may be used within any Microsoft InfoPath project.
This article is provided without any warranties. Copyright for this article is
non-transferrable and remains with the author, S.Y.M. Wong-A-Ton.