Exact existing formula
How the score is calculated
Score = source-reported yield × (grade points ÷ 12) − decay penalty. Grade points are A+ 12, A 11, A− 10, B+ 9, B 8, B− 7, C+ 6, C 5, C− 4, D+ or D 3, and F 0. The decay penalty is 4 when flagged and 0 otherwise. Higher scores sort first.
