Paradigm Shift: Less than $35 a week grocery budget

A common budget area people like to cut down on how much they spend on is the grocery area. When I started this blog I posted an exercise where I took a sales flier from one of the grocery stores in my area and built a menu to feed a family of four for six days for $66.
Later I found out the goal around the frugal blogosphere is the $35 a week menu. So, do you think that