A “paper exercise” usually means a thought experiment or imagination game ie not one done for real.
In this case, knowing Valhalla prices in Australia are utterly insane, a “paper exercise” might be interpreted as “needing an awful lot of pieces of green paper” ie bucks
In this case, knowing Valhalla prices in Australia are utterly insane, a “paper exercise” might be interpreted as “needing an awful lot of pieces of green paper” ie bucks