How can I build an 'if X then Y' into a default response?

Hi, long time lurker, first time poster...
My dilemma...
I am using the output from my survey to populate another system through a csv upload. Through the respondents answers I want to determine a final, hidden, variable that will assign them to a prescribed group in the new system. 
It's basically an if, X then Y scenario. 
Q2 - what department are you in? (dropdown list)
-Finance
-HR
-Botany
-History
-Enrolment Services

Q3 - what is your role? (dropdown list)
-Admin
-Faculty
-Other

Q4 - outcome (hidden text)
- Staff (if Q2 = Finance or HR)
- Staff (if Q2 = Botany or History and Q3 = Admin)
- Faculty (if Q2 = Botany or History and Q3 = Faculty)
- Enrolment Services (if Q2 = Enrolment Services)
I thought I could configure this through Autocomplete with my original survey as my supplemental data source, feeding my secondary survey which would become my export but I can't figure out how to make an if/then statement work.
ps. I want to keep it as simple as possible as I will be handing it over to a client without technical skills.