My son was born early and was on a high calorie Enfamil and breast feeding combo for the first seven months of his life. The Enfamil was $13.65 a can for the 12.5 ounce cans and he got up to two and a half can a week plus babyfood! When his weight finally got to where it was supposed to be , our pediatrician ok'd him for regular formula. He recommended Enfamil and I had been very pleased with it the whole time I had been using it. However, I was picking up a case of diapers and wipes at Sam's club one day and noticed their brand of formula. It was over 3 lbs for $20.00. I looked over the comparison...