Conversation so far:
What happened with the band Good Charlotte in 2009?
On December 3, 2008 Kerrang! magazine announced that Good Charlotte would be releasing its fifth studio album, Cardiology in 2009.
How did the album Cardiology by Good Charlotte do?
It debuted at number 31 on the Billboard 200; it charted within the top 30 on five additional Billboard charts.

Question: How many units did it sell?
Self-contained rewrite: How many units did the album Cardiology by Good Charlotte sell?