How are these numbers calculated? (show)

Points Behind 1st  (Full Screen)
Chance Will Win Championship  (Full Screen)
RaceFinishStartLapsLeadPointsBonusPenaltyTotalPurse
Orbitz 30032221136767$45,100
Stater Bros. 3003421137616124,590
Telcel-Motorola Mexico 200
Sam’s Town 300152920011811827,005
Nicorette 300213219410010016,350
Sharpie Mini 300278281828227,905
Pepsi 300
O'Reilly 300211919810010027,493
Bashas' Supermarkets 200202120010310322,730
Aaron’s 3128512014214231,580
Circuit City 2502521248888820,898
Diamond Hill Plywood 20021914710010020,280
Carquest Auto Parts 300194019910610621,706
Dover 200171319911211221,473
Federated Auto Parts 300
Meijer 300
AT&T 250
Camping World 200162320011511522,305
Winn-Dixie 25019610210610627,805
USG Durock 3002212198979728,722
Gateway 250
Kroger 200
NAPA Auto Parts 200
Zippo 200 at The Glen
Carfax 2503510122585823,317
Food City 250
Camping World 300
Emerson Radio 250
RoadLoans.com 200
Yellow Transportation 300
Dollar General 300
Sam’s Town 250
O'Reilly Challenge
Arizona.Travel 200
Ford 300
2,85801,555+0-0=1,555$409,259