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UPC Add-on Barcode Code table
B4 B3 B2 B1
0
0
0
0
0
0
0
0
1
0
0
1
0
1
0
0
1
0
0
1
1
0
1
1
1
0
0
1
0
0
1
0
1
1
0
1
1
1
0
1
1
0
1
1
1
1
1
1
S
B8
0
0
0
0
B7
0
0
0
0
0
0
1
1
B6
B5
0
1
0
1
0
1
2
3
0
0
0
1
1
1
0
2
2
1
3
3
0
4
4
1
5
5
0
6
6
1
7
7
0
8
8
1
9
9
0
A
1
B
0
C
1
D
0
E
1
F
I
0
0
0
0
1
1
1
1
1
1
0
0
0
0
1
1
0
0
0
1
0
1
0
1
4
5
6
7
8
9
196
S
O
1
1
1
1
1
1
0
0
1
1
1
1
1
1
0
0
1
1
0
1
0
1
0
1
A
B
C
D
E
F
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