Printronix ThermaLine Series Programmer's Reference Manual page 256

if the 6 digit number ends with:
(1) 0
Example: 124560
(2) 1
Example: 275831
(3) 2
Example: 412022
(4) 3
Example: 876543
(5) 4
Example: 753774
(6) 5, 6, 7, 8, 9
Examples: 213756
517019
5–118
Table 5–17. Six–Digit Zero Expansion
then the MFPS Number is:
the first 2 digits (of the zero
suppressed number) plus 000
12000
the first two digits plus 100
27100
the first two digits plus 200
41200
the first three digits plus 00
87600
the first four digits plus 0
75370
the first five digits of the zero
suppressed number
21375
51701
and the Product Number is:
00 plus the THIRD, FOURTH
and FIFTH digit (of the zero
suppressed number)
00456
same as above
00583
same as above
00202
000 plus the FOURTH and
FIFTH digit
00007
0000 plus the FIFTH digit
00007
0000 plus the SIXTH digit
00006
00009
Bar Codes