From the article:
With improvements in the rate of production from genetic engineering, Voigt estimates that gasoline could be produced at $1.65 per gallon from sugar cane bagasse.
He expects fuel from cellulosic sources like poplar would be cheaper at $1.10 to $1.30 a gallon. But creating reliable cost models at this point is hard since there are no cellulosic fuel crops in production to base an estimate on, he said.
With all the bagasses I see out shopping, they should never run out of feedstock.