The first paragraph mentions that it was spotty part-time work only available when the Washington Redskins are playing. The Redskins are an American football team. They played a total of 21 games last season, including pre-and-post season, of which only 11 were held at FedEx Field, where Carlos worked, and each game only lasted a few hours plus maybe an extra two hours for pre and post game. So try $21(5 hours day)(1 day/week)(11 weeks/year) and you only get $1,155, not $40,320.