The numbers

Here are the foods we purchased and ate during our Eat Local week:

Whole wheat flour, 9 lbs: $6.48
Apples, 10 lbs: $9.90
Fair Trade tea, 22 bags: $3.20
Fair Trade coffee, 4 oz: $2.67
Milk, 5.5 gallons: $8.54
Butter, about half a pound(?): $7.45
Honey, 1 pint: $5.50
Spinach, 1 bag: $3.00
Apple cider, 1 gallon: $4.00
Blueberry wine, 1 bottle: $11.99
Sales tax: $1.69
Total: $64.42

All the other foods we ate either came from our garden/hens or were a gift (the maple syrup and chestnuts). I didn't include salt because I couldn't find the price and I think what we consumed would have been a few pennies' worth in any case.

Our expenses for the week came in well under the $121 that the typical American family of our size/income spends on food per week. For comparison, I averaged our food expenses for 10 weeks earlier in the year. Including restaurants and wine, our average food expenditure per week is $59.69. Eating all local food for a week cost less than $5.00 extra. Ben pointed out as well that certainly don't buy wine every week--we just happened to buy it during this week, which put our expenses up. So I think all things considered we came out about the same. Not bad for a first try!