# Telerik Extension Functions

- [Telerik Page Footer Sum](/brixxbox-documentation/app-erstellung/how-tos/telerik-extension-functions/telerik-page-footer-sum.md): How to use brixxbox custom functions in telerik
- [Telerik Page Header Sum](/brixxbox-documentation/app-erstellung/how-tos/telerik-extension-functions/telerik-page-header-sum.md): Sums elements in a table up to this header (carry over from previous footer sum)