If you are asking how to get your PPC cost to $0.02, then it all depends on what products you want to bid on. Are you just going toward a targeted cost of $0.02 or are you trying to go for some kind of CoS (cost of sale). I would really focus on Cost of Sale and what you can afford. If you see your market is not converting at that, you may want to go up and see if you can go deeper on buying power so that you have more room to spend.