Swift Thinking

A pint of Chunky Monkey is pricier than previous, in part because dairy prices are real high. That's in part because feed grain prices are high, which is in part due to the fact that ethanol sales are driving up demand. So our cars are competing with our cows for food. I haven't seen these numbers anywhere, but I'd like to know: How many daily servings of cornbread does it take to fuel an Escalade? I'm sure that creating fuel from the grain is a costly and laborious process. Why not save steps and simply fill our tanks with people?