Welcome to your interview.
The question is on your right: Calculating Social Campaign ROI. Take a moment with it first.
Talk your thinking through with me if you like - when you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes). Discussion and graded submissions share your five interviewer interactions, so spend them well.
If a marketing manager asks you to calculate the Return on Investment (ROI) of a recent social media campaign, what data points do you need and how do you calculate it?