Welcome to your interview.
The question is on your right: Fixed vs Variable Costs. 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.
Explain the key differences between fixed costs and variable costs in an IT services delivery model at Luxoft India.