SATO CL412E Operator And Technical Reference Manual page 248

Appendix B: Bar Code Specifications
Calculating the
Mod 10 Check Digit
ODD
EVEN
Page B-6
If you wish to encode the UPC-A data "01234567890", follow these
steps to find the correct check digit.
0 2
1 3
1. First add all the numbers in the ODD positions.
i.e., 0+2+4+6+8+0 = 20
2. Multiply the result of Step 1 by 3.
i.e., 20 x 3 = 60
3. Add up all the numbers in the EVEN positions.
i.e., 1+3+5+7+9 = 25
4. Add the result of Step 2 to that of Step 3.
i.e., 60 + 25 = 85
5. Subtract the result of Step 4 from the next highest increment of
10.
i.e., 90 - 85 = 5
6. The correct Modulo 10 check digit for the 11 digit string
"01234567890" is 5.
PN 9001074 Preliminary
4 6
5 7
SATO CL Series "e" Printers
8 0
9 CD