I'm away for a week starting tomorrow, but I'm up for this when I get back!
In fact, a few weeks ago I started writing down the item and price each time I bought food and am delighted how well fed I and my partner are on so small an amount of money. Lots of offal, and three for £10 wild alaskan salmon from M&S help in this! That and buying a weeks worth of veg from the market. Sadly, my weekly wine bill was higher than the food bill, so wine is now OUT!