I was just realizing that I overstocked, too...My guess is we will only have gone through maybe 5 boxes. We started it at 6 months and it seems that she'll be mostly on finger food within a month (at 9 months). With DS, I think we kept mixing it with fruit in the mornings until he was almost a year, but now it's just so much easier to have the baby feed herself, since I have two to look after.
I'm donating a few boxes to our children's shelter. It's on their "wish list".