An expert in energy told me that the average price was $35 for the last 70 years to contradict my predicted oil price. It is very misleading.
First, inflation is not considered. To illustrate, today it costs about $7 for a big Mac with fried and a drink. I remembered I paid about $1 for the same 35 years ago. Second all the easy oil has gone long time ago - those oil that does not need a lot of drilling.
Just for production, it will cost more than $35. It means all the ocean-drilled oil and oil sand are not economically feasible at today's low price.