Just in case you were wondering, five pounds of carrots can be washed, trimmed, and sliced/shredded in approximately 5 minutes, using the spiffy attachment for a KitchenAid mixer.
And five pounds of sliced/shredded carrots exactly fills a nine-tray Excalibur dehydrator. Four trays of sliced, five of shredded.
Just in case you were wondering. :-)
Oh, and Chris asked in the comments for my last post if potatoes are cooked before dehydrating. Yes, you have to cook potatoes first otherwise they turn purply-black, which is not at all appetizing. I just blanch the pieces for 3-5 minutes in boiling water, depending on how big the pieces are- you don't want them so done that they're mushy and falling apart, just cooked through. Lots of things don't have to be blanched before dehydrating (these carrots are raw), but potatoes definitely do.