just my 2mBTC of calculation...

http://btcinvest.net/bitcoin-mining-profit-calculator.php?diff=21335329.113983&dcosts=1400&diff_mincrease=40&blpbtc=25&dhsmhs=10000&btcusd_mincrease=10&btcusd=74.60&dpowcon=30&dleadtime=2&pcost=0.25&calcweeks=52&action=calc

Please fix power consumption and diff increasements on your own.
40% / month are more than likely.

compare btc buy-in and mining buy-in results in USD as well as in BTC.

disclaimer: I am AM shareholder and own some UBE soon.