Amazon Sr Data Scientist interview questions

3 rounds, first round with recruiter. Second round asked a wide range of technical Qs. final round is about 6 hours. Gave a tech talk, were asked a lot about a past project.

Find the customer with the highest daily total order cost between 2019-02-01 to 2019-05-01. If customer had more than one order on a certain day, sum the order costs on daily basis. Output their first name, total cost of their items, and the date.