I have a table in which the entries in column A can be A, B or C and the entries in column B can be D, E or F (A through F are text entries, not numbers). I want column C to return numbers representing the combination of the text entries in columns A and B. For example, if cell A1 is A and cell B1 is D, I want cell C1 to return the number 10. Similarly, if cell A2 is B and cell B2 is E, I want cell C2 to return the number 4.

These are the possible combinations:
Column A/Column B/Column C
A/D/10
A/E/6
A/F/4
B/D/6
B/E/4
B/F/2
C/D/4
C/E/2
C/F/1

How do I do this? Thanks.