Video game's cost

[sample]

Hi, I would like to know what the budget of a game plateform game like Mark of the ninja.By "plateform" game, I mean 2D plateform, same graphic quality, no multiplayer...I especially need the "art" cost ( background, character sketch, in-game graphisme...)Thanks in advance. I don't wether I should send a pm to the community manager or post my question in here, so don't hesitate to redirect me.