Re: How many oz a day?
My dd is 3 months. I nurse her at 4 or 5 in the morning and don't get back to her until 4 or 5 in the afternoon. We usually don't nurse again until 6 or so. That's 12-14 hours between sessions and she takes about 16 oz at daycare.
General guideline is that they need an once per hour, but remember you might be feeding her for several hours before or after she's in your care.
I know it makes my dcp nervous, but it's totally okay with me if the baby is starving when I get there. I would rather nurse her than have to pump more.