Wayfair Data Science interview questions

The process took about 3 weeks. I received an email from HR setting up a phone interview. The interview lasted about 25-30 minutes. Fairly straight forward asking what you know about the company and questions about background. Heard back 2 weeks later for an additional interview with an analyst. It was two parts. The first was questions about the company and how you would fit in/help out. Second was a case question that wasn't too hard but a little tricky. Asking about calculating the profit of a scenario where they gave you number of units sold and conversion rates. Brush up on accounting 101 and know profit vs revenue. Overall I think I did really well and got the case question but not on my first attempt so that's probably why I didn't get an offer.