See our press release here:
Guyana loses out on US$ 29 billion from oil deal
References:
http://www.oggn.website/irr-calculations-for-3-2-billion-barrels-at-us-80/
http://www.oggn.website/liza-phase-1-450-million-barrels/
http://www.oggn.website/confirmed-reserves-3-2-billion-barrels/
http://www.oggn.website/average-price-for-brent-crude/
http://www.oggn.website/exxon-return-on-capital/