ok lets do some math

320exahash network
190thash $3639 and 5.2kw /asic
=1684210 asics
=$6112000000 hardware / 105000 blocks* / 6.25btc
=$9313.52 per btc hardware cost

..
1684210 asics x 5.2kwh
=8757895 kw/h  x  $0.04
=$350315.7894736842 per hour  /  6blocks**  / 6.25
=$9341.75 per btc electric

total = $18655.27 hardware+electric for todays hashrate of 320exa

*2 years of blocks
** blocks per hour