I have tried to take this exam. There are two formula questions where I provide answers that work based on the information provided. However, the system will not accept these formulas as valid answers. (Questions 3 and 9)
How do I either have these formulas accepted as value or understand why they are rejected.
All I can suggest here is that you make sure that every line item is spelled exactly as it was documented in the course. You can also send an email to firstname.lastname@example.org they might be willing to point you in the right direction. If you need the sprint 3 test reset, ask. Usually they will reset it quickly. You'll get another attempt.
Sorry, I know its frustrating. I went through the same thing, on that Sprint too. I suspect you may not get closure on this one.