Try

=(G90-G96)*(AVERAGE(IF(G109<70%,('Base
Data'!$I$31:$I$35),IF(G109<99.99%,'Base Data'!$H$31:$H$35,'Base
Data'!$G$31:$G$35))))

--

HTH

Bob

"Mark D" wrote in message
...
Good morning everyone.

I have the following calculation that is causing me a problem

=IF(G109<70%,SUM(G90-G96)*AVERAGE('Base
Data'!$I$31:$I$35,IF(G10970.01%<99.99%,SUM(G90-G96)*AVERAGE('Base
Data'!$H$31:$H$35,IF(G109100%,SUM(G90-G96)*AVERAGE('Base
Data'!$G$31:$G$35))))))

The 1st part of the formula (<70% ) is working and returning a value.
However if the % is greater than 70% I am getting the result FALSE

I'm sure it's a simple fix but cannot put my finger on it

Any help greatly appreciated,

Thanks