How are these numbers calculated? (show)

Points Behind 1st  (Full Screen)
Chance Will Win Championship  (Full Screen)
RaceFinishStartLapsLeadPointsBonusTotal
GAINSCO Auto Insurance Indy 30032420093535
Honda Grand Prix of St. Petersburg128831818
Indy Japan 3004520023232
Toyota Grand Prix of Long Beach
RoadRunner Turbo Indy 30012200495050
92nd Indianapolis 500122200301818
ABC Supply Company A.J. Foyt 225472253232
Bombardier Learjet 5504112283232
Iowa Corn Indy 25013250615050
SunTrust Indy Challenge463003232
Camping World Watkins Glen Grand Prix249191212
Firestone Indy 200261714040
Honda 2001713841313
Rexall Edmonton Indy79912626
Meijer Indy 300532003030
Motorola Indy 300416803232
Detroit Indy Grand Prix2011641212
Peak Antifreeze Indy 30066200132828
2,795164492+0=492