Dev costs can range as much as you want them to....Just depends on what you want.
Typically, the costs look like:
Wii: 4m-20m USD
X360: 8m-35m USD
PS3: 14m-40m USD.
It really just varies on what kind of resources you want to pull into a game: I doubt Beautiful Katamari for the X360 was made for more than $5m, whereas I honestly doubt Twilight Princess or Super Mario Galaxy was made for under $15m (probably more than $20m).
But on average, I'd put it at $8m for a "typical" Wii game, $14m for a typical X360 game, and $19m for a typical PS3 game.
Therefore, the breakdowns would look like:
Wii: 266,000 games sold @ $30 Profit
X360: 373,000 games sold @ $37.50 Profit
PS3: 542,000 games sold @ $35 Profit
Profit is defined as retailer wholesale minus console licensing fees.
Back from the dead, I'm afraid.
