BHP Billiton has estimated the job cuts will result in a one-off total cost of about $US500 million ($772.6 million). BHP Billiton is cutting coking coal production in Queensland by about 10 to 15 per cent in response to reduced demand. ``It will be something like four to six million tonnes (per year), our share,'' Mr Vanselow told reporters. There was uncertainty in the medium term outlook, he said. But BHP Billiton had a strong balance sheet to see out the turmoil in financial and commodity markets, he said.