I think I read all of the "nested if statements" in the forum but I couldn't find my solution - so sorry for starting another one! Here is my situation:
Field AM5 possible values: F, FA, LTI, RMTC, OI, OILWL, [blank]
Field AN5 possible values: E, DC TP
IF AM5 contains: F, LTI, RMTC, OI...