How are these numbers calculated? (show)

Points Behind 1st  (Full Screen)
Chance Will Win Championship  (Full Screen)
RaceFinishStartLapsLeadPointsBonusTotalPurse
Ethanol IndyCar 300 at Miami1810901212$35,200
St. Petersburg Indy131798171743,000
Firestone IndyCar 300 at Japan1314197171764,600
Kansas IndyCar 300915198222244,600
Indianapolis 50014181651616252,305
Milwaukee A.J. Foyt IndyCar 2251312222171743,000
Bombardier Learjet IndyCar 550K at Texas1718195131335,200
Ethanol IndyCar 250 at Iowa121099181843,100
Richmond IndyCar Challenge1317249171741,800
Watkins Glen IndyCar Grand Prix151660151539,900
Firestone Indy 200 at Nashville1211198181844,400
Honda IndyCar 200 at Mid-Ohio131484171743,000
Firestone IndyCar 400 at Michigan815167242446,000
Kentucky IndyCar 300310200353586,050
Sonoma IndyCar Grand Prix151571151539,900
Detroit IndyCar Grand Prix91387222249,000
PEAK Antifreeze IndyCar 300 at Chicago1018198202042,000
2,578315+=315$993,055