Hi

I need some help,please.

I need a formula to claculate a value when input A and B are inserted. The
table below details the values I am working with and depending on the values
the results will change.
If we drew a line from 8 and 3 the yellow squares would be used in the
calculation.

Input A
1 2 3 4 5 6 7 8 9 10 11 12 36 Input A 8
2 3 4 5 6 7 8 9 10 11 12 20 Input B 3
3 4 5 6 7 8 9 10 11 12 12 Result 68
4 5 6 7 8 9 10 11 12
Input B 5 6 7 8 9 10 11 12
6 7 8 9 10 11 12
7 8 9 10 11 12
8 9 10 11 12
9 10 11 12
10 11 12
11 12
12
68


If we changed the inputs and the position of the line the following squares
would be used.


Input A
1 2 3 4 5 6 7 8 9 10 11 12 78 Input A 12
2 3 4 5 6 7 8 9 10 11 12 77 Input B 12
3 4 5 6 7 8 9 10 11 12 75 Result 650
4 5 6 7 8 9 10 11 12 72
Input B 5 6 7 8 9 10 11 12 68
6 7 8 9 10 11 12 63
7 8 9 10 11 12 57
8 9 10 11 12 50
9 10 11 12 42
10 11 12 33
11 12 23
12 12
650