Too many arguments

Trying to add an argument to an already working formula - see attached worksheet w/the formula/cell in question in yellow.

I need to add the following logic to the existing formula,

If L10="N", AND O30<L9, then O30-L9, otherwise, if L10="", then O31-L9.

I have tried AND, but I'm not entering something correctly.

Any guidance would be greatly appreciated!

Thank you both - I tried to add your suggested formula to the existing formula but I still get "too many arguments".

I'm sorry - are you unable to view the formula in the file i attached? If not, it's =IF(OR($L$6="Deltacare",$L$6="Cigna DHI"),"",IF(O31<L9,"",O31-L9))
The cell is highlighted in yellow.

It's not 100% clear how you want to fit these new arguments in with the existing formula but perhaps this.

Formula:

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Thank you - hmmm...still not working. I'll try to better explain what I need this cell to show.

It(P36) should be Blank if L6= Deltacare or CignaDHI - regardless.
If L6 is anything but those two, it should determine if L10 = N (this is the new variable I'm adding to the formula)
If L10=N, then it should determine if O30 is greater than L9, if yes, then the value should be O30-L9, if no, then the value should be blank
If L10="", then it should determine if O31 is greater than L9, if yes, then the value should be O31-L9, if no, then the value should be blank

I hope that helps. Thanks so much for your efforts!

Here's another try.

Formula:

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Perfect - had to fix a couple of typos but the logic works! Thank you so so much!