A B

1 10

2 9

3 8

4 7

5 6

6 5

7 4

8 3

9 2

10 1

I need a formula that takes the difference of the two columns (1-10, 2-9, etc.) and then finds the average for all of the differences. I don't want to have a third column with the differences and then take the average of those. Any help would be much appreciated.

Thanks,

Steve