Passage: According to a national ranking of how well bishōjo games sold nationally in Japan, the original Air PC release premiered at number one in the rankings. The game ranked twice at 42 in November and December 2000, at 20 in January 2001, and twice more at 42 through February 2001. The original release appeared on the charts twice more: the first in late September to early October 2001 at 26, and again in the last two weeks of May 2002, ranking in at 43. The regular edition of the Air PC release premiered at number 13, ranked in at number 41 in the following ranking, and 42 in the ranking after that. The PC all ages version premiered at number seven in the rankings and had a final ranking at 30 in the next ranking. The Air Standard Edition premiered at number one in the rankings. The Air Standard Edition ranked in twice more, at 34 and at 28 in the next two rankings. Air was the highest selling game of 2000 selling 102,080 units, which was about 25,000 more units than the second highest game, Inagawa de Ikō!. The Dreamcast version sold 42,445 units in its first week, and was the fourth highest selling console game in Japan that week. The video game magazine Famitsu scored this version a 30 out of 40, and it ultimately sold 50,406 units to rank as the 53rd highest selling Japanese Dreamcast game ever, as of 2007. NTT Publishing reported that over 300,000 units of Air have been sold."Air took the bishōjo gaming world by storm," as states a review of the Dreamcast game by MobyGames. Air was described as a game that stands out, much like Key's first title Kanon, due to an intricate plot that keeps the player interested, and has a good replay value as well. In an interview of Jun Maeda and Yūichi Suzumoto, they were both surprised to find out that the Japanese public (in March 2001) felt Air to be a soothing game, but Maeda and Suzumoto made it clear that this impression is completely at odds with their impression of the game, and they remark that there was not one person who worked on Air who thought that. Characters...

Question: During its debut week how many units did the Dreamcast sell?
42,445