The quantity seen below (9-10 carrots and 9-10 celery sticks) makes about 48oz of juice in a Breville juicer. I got my juicer on sale at QVC.com. Score!
I purchased the carrots and celery in my weekly Costco food haul. To me nothing beats warehouse shopping, if you like to juice and/or eat raw, fresh, organic veggies.
*Cheap tip--- don't get sucked in by warehouse prices. Only buy what you know you and your family will consume. Fresh Fruits and vegetables are highly perishable. So if you think you won't eat it all in a few days, buy the frozen varieties instead.
I purchased this quantity for a week of juicing. I make 32-48 ounces at a time.
Carrots 10lb bag $7.99