northern star resources ltd said weakerthananticipated output and increased costs from its pogo mine would likely result in higherthanexpected group costs this fiscal year the australian gold miner on wednesday lifted its forecast for fullyear allin sustaining costs to between 1600 australian dollars us1140 and a1640oz up from an earlier estimate of a14751575oz it kept its gold output target unchanged at 155165 million ounces as foreshadowed higher mining inventory at pogo is delivering a better milling outcome but we have more work to do to deliver on pogos potential managing director stuart tonkin said the company lowered its fullyear production forecast for the pogo mine to 205000220000 ounces from 220000250000 ounces previously it now expects costs at that site of a2150a2230oz up from an earlier forecast of a1700a1800oz northern stars fy22 guidance for its australian operations which account for 85 of the group portfolio remains unchanged despite input cost and ongoing covidrelated workforce challenges it said