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UPC-E Checksum Calculation
Use the sample data of 123456 to demonstrate the UPC-E checksum calculation:
The 6 digit UPC-E code is converted to a 10-digit code, using an expansion scheme based on the sixth digit:
Because the sample UPC-E code ends in a 6, the insertion digits 0000 are inserted at the sixth digit (insertion position 6):
1234500006
Add the Number System Character of 0 to the sample data:
01234500006
Use the UPC-A check digit calculation descr ibed in the previous section to produce a check digit as if it were a UP C-A code. The
check digit for the sample data is:
5
The complete 8 digit code consists of the Number System Character, the original 6 digit code and the check digit:
01234565
If the code ends in:
UPC-E Data
Insertion Digits
Insertion Position
10 digit code
0
abcde0
00000
3
ab00000cde
1
abcde1
10000
3
ab10000cde
2
abcde2
20000
3
ab20000cde
3
abcde3
00000
4
abc00000de
4
abcde4
00000
5
abcd00000e
5
abcde5
0000
6
abcde00005
6
abcde6
0000
6
abcde00006
7
abcde7
0000
6
abcde00007
8
abcde8
0000
6
abcde00008
9
abcde9
0000
6
abcde00009