I am using the averageifs function, and have one column where I need to calculate the average if either of the criteria are true.

I have tried using the OR function, and tried the curly brackets, but both give me errors.

> 
> =AVERAGEIFS(N1:N612,I1:I612,{"FL","IF"})
> 
> 
> 

There are more ranges, but the coding for those is fine.

To be clear, I want to return an average if column "I" contains (specifically) the letters FL, **OR** the letters IF. Any other letters should mean that entry is not averaged.

TIA!