The National Basketball Association players’ union spent about $5.42 million on the internal audit that resulted in the firing of Executive Director Billy Hunter, according to public records. The union spent $5,421,965 on matters pertaining to what it labeled NBPA Internal Review & Investigation on its annual filing with the U.S. Labor Department. The LM-2, as the filing is known, covers July 1, 2012, through June 30, 2013. With 438 members, as listed on the form, that breaks down to $12,378 per player. Annual dues are $10,000. The biggest expense, $3.56 million, was to the New York-based law firm Paul Weiss Rifkind Wharton & Garrison LLP, which conducted the nine-month review that found Hunter failed to manage conflicts of interest, lacked proper corporate governance and didn’t disclose that his $3 million-a-year contract wasn’t properly ratified. Hunter was fired in February last year, about a month after the 229-page report was released.