I believe you are taking the Level 2 Model Building exam on the supply chain use case?
Then I suppose you need to read through the boolean requirements again. The 3rd Boolean Override Amount - Write? in AD02 is the combination of 1st Boolean (which you got it correct already) AND another one instead of the current Submit Purchase Order - Write? that you are using.
Hence, it is marked as wrong due to the wrong business logic not in terms of purely whether the formula works or not or Chrome formatting (I am using Chrome also).