Ounces Recovered Per Month 1,500 Operating Costs per Ounce – up to $250 Royalty (15%) $240 It would take approximately 150 working days of operation to process all of the tailings. Tailing processing projected revenue is $100,000 per day (assuming $1,600/oz), with an expected gross profit of $10.4 million over the duration representing approximately 7,700 oz recovered.