Saving Money

My wife thought I was crazy when I told her I saved some money when I bought a 2 liter for $1.00 at the gas station (which was typically $1.59). She said "well it is for $0.98 at the Commissary." But because I am a Jordan I had to be right so I thought there for a minute and then replied, that I still saved money, in fact I saved 8 cents. She asked me how was that. So I explained: "With gas being $3.89 a gallon and our car getting 28 miles to the gallon that would roughly be 15 cents per mile. Now with the gas station being 0.7 miles from the house and the commissary being exactly 1 mile from the house, I saved 0.6 miles in traveling which would equal 10 cents saved in gas spent minus the 2 cents extra for the drink, I was able to save a grand total of 8 cents." She looked at me like I was crazy and just replied with an "Ooo kay."