How much money could Sony make from Gran Turismo 5?

[zaMy]

lets see. most GT games sell 10m.
costs $70 for GT5.
$70 x 10 000 000 = $700 000 000 So they COULD make this much if it sells 10 m

but I think its more likely that the game will sell 5mill. so
$70 x 5 000 000 = $35 000 000

except the 35 million wont all be profit of course