OMG, where do you live that organic milk and eggs are that expensive?! We pay about $3 for organic eggs and $4 for organic milk. (Regular eggs are routinely on sale for $1 and milk for $2.50.)
As my exclamation points out, prices vary drastically by region and often significantly in the same town by store, so we can't answer this question for you.
Trying to figure out where you lived, I clicked on your profile and saw that you post on the military boards. Are you not near a commissary? It'll be your cheapest by far - by law, they're only allowed to charge cost + 10%.