I use a centrifugal which although it's not meant to be the absolute best healthwise, does leave me with a very dry pulp.
I use an 8 oz glass (and drink 6 to 8 of these per day) and it would take me to make 1 glass:
1 handful of parsley, 1 carrot, 1 apple, 2 Celery stalks, 2" chunk of cucumber.
1 baby beet, 1 1/2 cups cabbage cut into chunks, 2 Celery stalks and 1 large apple.
If I were you I'd just go out and buy what looks fresh and good and plan to shop again (or have someone shop for you) in a few days.
I shopped for veges every 2 - 3 days while juice fasting, though this might not suit everyone.