STUDY HOURS FOR FR EXAM

I am a full time student studying ACCA. Started ACCA right after my school with no prior accounting studies or accounting work experience. I study full time,no employment whatsoever.

How many hours in total should I dedicate to study the FR exam(everything including lectures,reading and practice). Also, I need to score atleast 75-80 so that I may get First Class Div in OBU Degree.

I am aware with the fact that it varies from person to person, so please dont say that. I wanted an estimate ballpark figure of how much hours will I have to devote to this exam to score atleast 70-75. Personally, I am making a stab to devote around 300 hours to this exam.

I am in need of some advice and recomendation on the total study hours actually needed to score above 75-80 marks so that I may plan accordingly.