Welcome to VGCharts I believe that the console manufacturers make something of the order of 20% on the selling price of a game. I can't remember the exact figure but it was around 50% to retailers, 10% to warehouse / stock / transport, 20% to Nintendo / MS / Sony and 20% back to the publisher which then gets split with the developer. So for a $50 game, there isn't actually a lot which gets back to the developer!