Hello,

i am a newbie with SF and i am in desperate need to create a custom numeric field with inside a formula with the following validation rule:

1)take the first 9 number provided and multiply these numbers repectly with:6, 5, 7, 2, 3, 4, 5, 6, 7

  for example if the 9 numbers are: 1,2,3,4,5,6,7,8,9 it is: (1*6) + (2*5) + (3*7) and so on....

2)Sum of the multiplications

3)Check of the last number provided (the 10th number) with the following: check digit = sum of the multiplications -  (218/11) * 11

Thanks a lot very much.