INTRATE function

[trey]

I am trying to use the INTRATE function but can't find it in the list of
formulas.

 

[Max]

INTRATE requires the Analysis Toolpak (ATP) be
installed and activated in Excel

Check the "Analysis Toolpak" box
(via Tools > Add-Ins)

Chip Pearson's page has details on the ATP at:
http://www.cpearson.com/excel/ATP.htm