Congrats for the interview!
Unless they specifically told you so, the focus of the job does not have to correlate with the cases you are going to get.
Why? Because each interviewer has his/her own case, and who interviews you is mostly a matter of availability.
Hence, this would be my advise in the business case front prep (knowing that you also have the FIT part)
You don´t have any more time to the classics of Viktor Cheng, "Case in point" book, etc. You need to get hands on asap:
1. Practice cases with partners asap, as many as you can do.Find experienced partners who can provide a good feedback
2. Practice your math skills, both in your cases and with ad hoc exercisess, such as:
1. Multiplying double digit numbers (https://www.youtube.com/watch?v=6ndkkPZYJHo
2. Leveraging math tools (Mimir math for iOS), Math tool on Viktor Cheng website to practice
3. Ensure you have a good overview of the most common case types:
- 1. Profitability cases- basic profitability framework.
- 2. Idea generation cases: for any specif issue
- 3. Growth cases: market penetration, new product launch, product mix change, etc.
- 4. Pricing cases
- 5. M&A cases
- 6. Valuation cases
- 7. Value chain cases
Hope it helps!