How much is commercial for Exxon ?

"According to the information, Guyana has found a large quantity of the commodity;” beyond commercial amounts”. The American company, Exxon Mobil, drilling offshore Guyana’s border with Venezuela, had announced earlier this month that the country had great potential when they found hydrocarbons."

http://www.caribnewsdesk.com/news/9903-dr-rupert-roopnaraine-tipped-to-be-vice-president-responsible-for-natural-resources