1. 1-24hr late:-10%
2. 25-48hr late:-20%
3. more than 48hr late: -15% more for each 24hrs period
If n reports are found to be exactly the same, the final score will be given by dividing the original score by n.
For example, the original score of report A is 90, and we find that the content of report B is exactly them as A; then both of report A and B will be given 45 (90/2).