Annualized Turnover

Summary

Does anyone have a report that calculates annualized turnover by month?

Content

I have a table that calculates Turnover Rate by month but our management team is looking to get the Annualized Turnover for each month.  I realize the calculation would have to different for each month.  You have to sum the previous months Turnover Rates and then divide 12 by the # of months of data you have, so January would be 12/1 and February would be 12/2, etc. (see example attached), so I'm not sure if this is doable in OTBI.  I have attached the initial Turnover Rate report.  Just wanted to find out if anyone else has been able to create a