Query: How many units of the Wii version of Twilight Princess had been purchased by the end of March 2011?
Context: During its first week, the game was sold with three of every four Wii purchases. The game had sold 5.82 million copies on the Wii as of March 31, 2011[update], and 1.32 million on the GameCube as of March 31, 2007[update].