you should probably be mining monero for anonymity, it's what all the crypto criminals use. http://monerobenchmarks.info/list.php
go to list the intel cpus and search for 3570. you'll see hash rates anywhere from 100 to 300 based on mining software used.
for a conservative estimate, just say 100 H/s. pic related is https://www.cryptocompare.com/mining/calculator/xmr
. actually, you should put a cap on the mining software so that it can only use 30% cpu power at any time, so (I think anyway) that's going to be around 30 H/s. so if there's 60 computers that's 30*60 = 1800 H/s. using that website comes out to $1.61/day, $11.26/week, $48.24/month. It's not much but I'd say that's worth it if there's no chance of getting caught.
I mean theres coins focused on CPU mining though maybe you could look into those too. both websites I put here are really useful in general.