OR operator in set analysis

[wonkymeister]

help please

drowning in set analysis as per usual!

something so simple yet appears so difficult, an OR in my sum. how to OR???

example - how do i OR the Grades/PredictedGrades?

=sum({Capps<

Year={'$(vYear)'},

  Decision={'Offer'},

  Response={'Firm'},

  Location={'L','N'},

     /////////////////////

  Grades={'A'} OR PredictedGrades={'A'}

     ////////////////////

  Semester={'Semester 1'}

>} Heads)

do i stick brackets around both?

ie

(Grades={'A'} OR PredictedGrades={'A'})

?????

cheers in advance people

Wonky.