hmmm... Let me tell you a story about the cost ,as i remember, A printing press breaks down and all the workers couldn't figure out what has gone wrong with press. They spend hours searching to find the problem.then finally they call Pressing engineer and the engineer comes fixes one nut and bolt of certain part and the press starts running again.The press owner asks how much ?The engineer replies 100rs .surprised by the cost of the repair , Then the owner asks but that nut and bolt just cost 1 rupee.Yes, the engineer replies but where to fix nut and bolt costs other 99 rupees. Don't just add cost of the hardware :) It is the cost of idea , the knowledge