Actually, from the definition that you provided I did not inaccurately include workers. There was also the general administrative cost, sales cost exc. that JBII accounted for in their financials. This generated a huge loss.
As for the selling 1000 barrels vs 100 barrels is not an argument IMO. JBII is sitting on probable thousands of barrels, since Dec 15, 2010 when they were given the go ahead by NYS DEC. Thus, it is not that they only made 100 barrels, they only sold a small proportion of what they generated. One would believe that the overall cost is normalized over say 10,000+ barrels and not just 100 barrels.
As for the starbucks analogy, one cannot use that here. Employee cost is fix, but JBII can store the rest of the fuel. Thus, the end result is a fixed cost for the fuel. For starbucks, if they do not sell the coffee they discard it, no more revenue can be made. JBII can store the P2O and make revenues later. The cost to produce is set and should be reflected in JBII numbers that they reported for the turn cost of price per barrel. It JBII employees produce more P2O during the same period of time, then the cost per barrel decreases.