Paste this into C1 and then copy down (watch the wordwrap; this is all one
line):
=IF(A1="A",IF(B1="D",10,IF(B1="E",6,IF(B1="F",4,""))),IF(A1="B",IF(B1
="D",6,IF(B1="E",4,IF(B1="F",2,""))),IF(A1="C",IF(B1="D",4,IF(B1="E",2,IF(B1
="F",1,""))),"")))
There is probably a better way to do it, but this works.
--
He carried himself like an angry ox.