a-A
b-I
c-Z
300x15/100 = 45 g
d-E
ms = 40+360 = 400g
c% = 40x100/400 = 10%
e-C
400-40 = 360g
c% = 40x100/360 = 11,11%
f-E
ms = 350+10+120 = 480 g
md = msxc/100 = 350x12/100 = 42g
md.final = 42+10 = 52g
c%.final = 52x100/480 = 10,83%