Two rigs not mining in Hiveon pool = daily cost $0

Hello,

I have two rigs mining eth not in Hiveon pool because I’m from SA and ping to the closest Hiveon pool gives me too many stale shares.

Daily cost says it’s 0, but I don’t get it, I’m supposed to be paying a fee of %3 wich I don’t know if it’s working. I would prefer to pay 3 dollars per rig instead of 3%. How could I know if I’m being charged for that?

Thanks for help! Regards.