Revealed XBLAugust prices incorrect [Update]

The official Japanese Xbox 360 blog has posted prices for Xbox Live's "Summer of Arcade" series (i.e. five weeks of awesome releases). Let's review:

• July 30: Geometry Wars: Retro Evolved 2 (800 MS points / $10)
  
• August 6: Braid (1200 MS points / $15)
  
• August 13: Bionic Commando Rearmed (800 MS points / $10)
• August 20: Galaga Legions (800 MS points / $10)
• August 27: Castle Crashers (1800 MS points / $22.50)
  

At $22.50, Castle Crashers would hold the record for most expensive XBLA title. The total price for the Summer of arcade is $67.50, which is a little bit more than a standard Xbox 360 title + applicable tax. The prices are currently set for Japan only, but they generally don't differ with the North American releases. Is your wallet prepared?

Update: Microsoft tells Shacknews these prices are incorrect, and that the final prices won't be revealed until the Monday before each respective game launches.

[Via X3F]