.538 g/m3 using 260 hours in the average month of mining, which is 10 hrs of mining per day, (with an additional 2hours of cleanup) for one shift only of workers, I came up with 600+ oz/au for 260 hours at 200+ tons/hour of capacity. taking the low numbers, 260 hrs, 200 tons/hr, 600 oz, I came up with .538 grams/m3 of rbyc calculations. Cannot say for sure this is their number, which of course is impossibly precise, but cannot say what their "more than 600" and more than 200 tons/hr mean. Oh yeah, they have multiplied m3/hr x 1.5 to equal tons per hour in past news releases, so thats what i used for extrapolating backwards from their stated tons/hr numbers.