Today's shave will be about as cheap as a shave one can get.
The Push Button I cost me $1.00 so the cost of that will be micro-cents per shave, but for the sake of this I will say I only use it once per week, so I will go with $.02 per shave. The KMF is maybe $.05 per shave, and lathers better than most high end creams I have tried. I wanted to as old school blade that I have, so I am loading a CVS carbon, at $.50 per blade, I am a big spender. I almost bathe in Clubman, so I will go another $.10
That makes today's total cost on shaving to be a whopping 67 cents.