I'm not trying to be rude (really) but I can't stop laughing right now!!! 
Ah so then it is 1.47 BTC for 4 hashing boards giving me 1.4TH/s?
But yes I think you've got it now.
4 Hashing boards = 1 Unit.
Ah so then it is 1.47 BTC for 4 hashing boards giving me 1.4TH/s?
But yes I think you've got it now.