From what I know, Jeff's avalon mines 10 BTC per day. Let's do some math!
10BTC/day/66 GH/s = xBTC/day/4.5GH/s
45BTC*GH/days*s = 66xGH*BTC/days*s (Simplified -> 66GH/s*xBTC/days)
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66GH/s
x = .681 BTC/day * 23.50$ = 16$/day * 14 days = 224$ on unchanged difficulty + 75$ offer = 299$ -149$ = 150$ profit for who sells this Jalapeno to him; however, keep in mind
on unchanged difficulty
** Note: Also assumes bitcoin value does not depreciate, but keeps a constant in USD value and difficult in mining.