Filter
Top Products
Sum of Products Calculation
This is an example of how the printer uses Sum of Products to calculate a
check digit for this data:
523245219
1. Weights are applied to each digit, starting with the last digit in the
weight string. They are applied right to left, beginning at the right-most
position of the field. Remember, a weight string must contain at least
two different numbers. This example has a weight string of 1,2,3,4:
field: 523245219
weight string: 412341234
2. Each digit in the field is multiplied by the weight assigned to it:
field: 523245219
weight string: 412341234
products: 2026616 54336
3. Next, the product of each digit is added together. This is the sum of the
products.
20+2+6+6+16+5+4+3+36=98
4. Divide the sum of the products by the modulus (10 in this case), only to
the whole number. The balance is called the remainder.
9
10 98
90
8
3-14 Defining Field Options