I’m diving into un-replied posts that were buried by our old forum software back in the day.
When I’ve managed edu labs in the past I’ve used PaperCut. It’s great. I use an average $/sq/ft cost. I’ve always doubled the actual ink cost because this covers head cleanings, repair wastage, etc. I think it was at like $3.20/sq/ft with a cheap paper included back in the day but this is just off the top of my head.