This is a guest post from Charlie Park at PearBudget. Recently, Get Rich Slowly readers got upset at the idea of spending $6 on a gallon of milk. Reading that, I had to chuckle a little bit: Shortly before we had to give it up, our milk went up to $11 a gallon. Yup. You read that right: $11. A gallon. Technically, the milk was free, but the boarding and care of the animals that give us the milk went up to $11 a week for every gallon we got. The payoff was awesome: farm-fresh, antibiotic- and gro