Hey I remember that law, dumb bad law, it would really suck for this guy, not only did he lose all that money from but he could get nailed for illegal discounting.
I think he is also going to also have to pay the state and Federal taxes which will be more than the people actually paid.
Wisconsin 32.9¢/gallon
Federal 18.4¢/gallon
http://www.wisconsingasprices.com/tax_info.aspx