can anyone help me with this CIE Grading system problem that i am having?

[Crimson-Saint]

so this is the situation...i am doing my AS levels again cus i did not get the marks i had hoped...but in order not to lose a year i plan on also doing the A Level(A2) Maths paper which is P2 and P3 and also statistics...because the university which i plan on going requires that i at least have 4 AS levels and 1 A level(subject being math) and all above C grade......

now my question is......if i get an A in my AS level maths and did not even appear for my A level math exam......what would be my FINAL grade? as the final grade would be the AS and A level grade for math combined am i right? AND if i get an A in my AS and a D or C in my A level....what would bemy final score then?

 

[Crimson-Saint]

i would really like to know if someone has any knowledge on the grading system pleaase