Good question. The article says that potential profits to the grocery companies are $1 billion by supporting the bag ban and cutting a deal to retain all the bag fees, but doesn't say how it was calculated. Even spread over the number of grocery companies in California, that's still not chump change. But now you've got me wondering -- how many hundreds of thousands of bags do the stores use in a year (and multiply that times 10 cents, deduct maybe 1-2 cents for cost)? I may ask my local store's manager about this when I see him next.