Current output of 1TH=1.29BTC/day
Output of 1TH/s in 10days = 10.29
Geometric sum of 70% of 10.29 for 35 "difficulties" = 42.5 BTC/TH/Year

Annual Daily output of 1MH/s = 0.000001290BTC
Edit: Annual = 0.0000426 BTC

Current value of LC = 0.0003

Hashrate required to repay 0.0003BTC in 1year = 7MH/s/share

10,000,000 shares of Labcoin.

Hashrate required currently for Labcoin to justify 0.0003BTC price with 1 year breakeven=
7MH*10,000,000 = 70TH/s
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10TH/sec/10,000,000 shares = 1MH/s/share
annual output of 1MH/s = 0.0000426 BTC
breakeven for 1MH/s to pay 0.0003 BTC = 7 Years
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These are given 100% Mining revenue -> DIVs
Actual payout is "70-80%" to DIVs
remaining 20-30% is retained to pay for hash upgrades
as such "future upgrades" should not be reflected in Book Value as they will be paid out from asset income.