Read this: In the PAL region, which covers most of Africa, Asia, Europe, and Oceania, Twilight Princess is the best-selling entry in the Zelda series. 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].
Now answer this question, if there is an answer (If it cannot be answered, return "unanswerable"): How many units of the Wii version of Twilight Princess had been purchased by the end of March 2007?
unanswerable