Welcome to your interview.
The question is on your right: Faster Digital Cash Register. 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 you were tasked with building a digital cash register interface for Dollar Tree, how would you optimize the user flow to minimize checkout times?