Thanks!
From the following article:
http://abcnews.go.com/International/us-led-planes-strike-isis-oil-facilities-syria/story?id=25739334
Centcom said the refineries produce an estimated 300 to 500 barrels of refined oil a day that generate as much as $2 million a day for ISIS.
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I call BS. If this is the source of the the $2 million a day, it was more likely a tenth of that amount. Math ain’t that hard; they are not getting $500/barrel.