I would like a formula that counts the # of entries that are marked for the event "Non-Public Schools Leadership Conference" that contain an admission item marked "Exhibitor" whose payment method is not marked "Free". What am I doing wrong in the formula below?
=COUNTIFS([Event Title]:[Event Title], "Non-Public Schools Leadership Conference", [Admission Item]:[Admission Item], (OR(@cell = "Exhibitor", [Payment Method]:[Payment Method], (OR(@cell <>"Free")))