Ann: Further High Grade Mineralisation at Douze Match-BYR.AX, page-123

"Lacking this rigorous method for a cutoff grade a simple expedient, commonly used, is to choose 30 or 35 g/t (Roughly one ounce).
Thus it is not uncommon to see announcement where intersections are reported as both uncut and cut (using XXg/t)"

I do not understand why one would choose 30 or 35 gt ?
Also cut off grade from my understanding is the grade at which the mine can be mined at a cash neutral basis , ie neither making a profit or a loss there fore if the price of gold goes up then at a cash neutral basis the mine can mine at a lower grade .
Also as the ounces per vertical meter increase the cut off grade decreases due to lower CAPEX needed per o and greater efficiencies in prodn achievable