What would my Study Score be for my philosophy class?

[Harryjollie]

Hello everyone,
So, the start of year 12 was tough for me, and as a result I didn't get very good marks on my SACS, but by the end of the year I've been able to pull it up and I've been getting pretty alright marks now. I'm wondering what the study score would be for my philosophy class, SAC marks provided down below.

(For those who will ask; I go to a VERY high performing school, the SAC average for this class I'd say is around A to A+)

1st SAC: D+
2nd SAC: C
3rd SAC: C
4th SAC: C+
5th SAC: B+
6th SAC: B
7th SAC: B+ (only worth 10 marks)
8th SAC: B+
Exam (hypothetically): B+ to A

Thanks in advance y'all