How are these numbers calculated? (show)

Points Behind 1st  (Full Screen)
Chance Will Win Championship  (Full Screen)
RaceFinishStartLapsLeadPointsBonusPenaltyTotalPurse
Camping World 300 presented by Chevrolet4112534040$49,243
Stater Bros. 300
Sam’s Town 300
Nicorette 300
Sharpie Mini 3002443169919128,918
Pepsi 3002629221858514,230
O'Reilly 3002842194797920,865
Bashas' Supermarkets 200
Mexico 200
Aaron’s 31252611715515527,575
Nationwide 250224251979715,450
Diamond Hill Plywood 200
Carquest Auto Parts 300
Dover 200
Federated Auto Parts 300141922512112117,025
Meijer 3002218198979719,425
Milwaukee 250131925012412417,775
Camping World 200
Daytona 2503039104737320,975
Chicagoland 3002230198979730,003
Gateway 250142320012112124,740
Kroger 200212620010010013,500
NAPA Auto Parts 200
Zippo 200 at The Glen
Carfax 2502318124949417,475
Food City 2502432249919120,885
Camping World 300
Emerson Radio 2502239250979715,950
RoadLoans.com 200
Kansas 3002234197979728,003
Dollar General 300
Memphis 2503013245737317,835
O'Reilly Challenge202419810310324,143
Arizona.Travel 200
Ford 300
3,64301,835+0-0=1,835$424,015