> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://zztakeoff.crisp.help/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# Using SUM Formulas

Not only does zzTakeoff allow you to inherit down information for parent properties, but now you can sum up from child items. Watch and see how easy it is in zzTakeoff${youtube}[](m_rzEZDhuTY)