| The job number used in this example is HIF13297I?. | ||
| The high order digit in the Rotation No. is multiplied by 6 | ||
| In this example 1 * 6 = 6 | ||
| The second high order digit in the Rotation No. is multiplied by 5 | ||
| In this example 3 * 5 = 15 | ||
| The third high order digit in the Rotation No. is multiplied by 4 | ||
| In this example 2 * 4 = 8 | ||
| The fourth high order digit in the Rotation No. is multiplied by 3 | ||
| In this example 9 * 3 = 27 | ||
| The fifth high order digit in the Rotation No. is multiplied by 2 | ||
| In this example 7 * 2 = 14 | ||
| The aggregate total of the result of each multiplication is then calculated: (6+15+8+27+14) = 70 | ||
| The third letter of the section prefix (in this case F) is searched for in the alphabet. The position at which the letter appears in the alphabet is (ie F is position 6), is multiplied by 7: F (position 6) * 7 = 42 |
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| This is added to the total above: 70 + 42 = 112 | ||
| The new total is 112 | ||
| The second letter of the section prefix (in this case I) is searched for in the alphabet. This letter's position is multiplied by 8: I (position 9) * 8 = 72 | ||
| This is added to the total above: 112 + 72 = 184 | ||
| The new total is 184. | ||
| The first letter of the section prefix (in this case H) is searched for in the alphabet. This letter's position is multiplied by 9: | ||
| H (position 8) * 9 = 72 | ||
| This is added to the total above: | ||
| 184 + 72 = 256 | ||
| The new total is 256 | ||
| If the total is below 11 it is moved straight into the check digit, otherwise, 11 is divided into this total giving an integer result and an integer remainder (256 / 11) = 23 with a remainder of 3. | ||
| The total is 23 but this is not required, only the remainder is used (3), which is subtracted from 11 giving a check-digit of 8. If the result is 10, 3 is moved to the check digit If the result is 11, 0 is moved to the check digit. If the result is not 10 or 11 then the remainder is moved straight into the check digit. | ||