Annualized Total Return Calc

[Jon Homes]

Hello,

I am just looking at the rental calculator and verifying the numbers, but I can't figure out how to calculate Annualized Total Return. The BP calc has it going down every year, but all my calculations are going up every year. 

In googlesheets I do this:

(Total Profit if Sold / Repair Cost) / # of years

It works for year one only and then it's messed up.