Welcome to your interview.
The question is on your right: CSV Processing With Sorting. 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.
Parse 2 different CSVs and merge them on certain rules and filter out certain data on certain rules, calculate a certain mathematical entity and finally sort them in decreasing order and print the corresponding metadata of the processed order.