Try to remember/find maximum mark for each paper.
For example I guess maximum marks for biology 01 is 120
so find out percentage of marks your scored from 120 i.e.
[obtained marks/maximum possible marks ] * 100
for bio 01 it's 113/120*100 =94% so for this unit, this is A.
after finding out percentage, if you get
>80% =A
70-79 =B
60-69 =C
50-59 =D
40-49 =E etc.
Similarly find for other modules.
For over grading, i'm not sure about the criteria but I think it is
80% overall AS+A2 AND >90% average of A2 units ------>A*
80% overall AS+A2 only --->A
70% overall AS+A2 only ----->B etc.
The document attached shows conversion of raw marks to UMS but since you already know your UMS, dont worry about conversion of grade boundaries.