No more Hummers?

GM has announced that it may stop manufacturing and selling Hummers. Decisions this big aren't made without a careful analysis of relevant numbers. I wonder which numbers factored into GM's decision...

$135.09/barrel?
$3.98/gallon?
8-13 miles/gallon?
91,889 bodies?
$0.39/share?

Did somebody say 39 cents?!