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3.
Next, the digits of the products are added together.
Two-digit products are treated as two separate digits.
This is the sum of the digits.
2 + 0 + 2 + 6 + 6 + 1 + 6 + 5 + 4 + 3 + 3 + 6 = 44
4.
Divide the sum of the digits by the modulus (
10
in this
case), only to the whole number. The balance is called
the remainder.
4
10 44
40
4
5.
Subtract the remainder from the modulus.
The result becomes the check digit. In this case, the
check digit is
6
.
10 - 4 = 6
Chapter 5. Defining Field Options
5-17