Column calculated with IF

Hi! 

Table A: szatendimento

I need to create a calculated column where:

If the datasaida column is filled and the account status is different from C, generate the letter F, otherwise generate the letter A.

I did so:

StatusF = IF (SZATENDIMENTO[DATASAIDA] <> BLANK (); "F"; "A")

I could not include the condition "and other than C".

I ask for help!

Thank you.