Ann: First Shipment of Concentrates and Logistics Confirmed, page-5

14 bags @ approx (2) wet tonnes each = 28t per container
Assume moisture content is 10% of weight
28t - (0.1 x 28t) = 25.2 t dry concentrates per container
Grade of concentrate is 69 g/t (as per details in Dec'21 quarterly)

Gold ounces per container : (25.2t x 69 g/t) / 31.1 = 56 oz
Gold ounces in 20 containers : 56 oz x 20 containers = 1120 oz in first shipment to Russia

If Stage (1) successfully ramps-up to 100koz p.a @ 69 g/t, export rate could be around 105 containers of gold concentrates being shipped to Russia each month (assuming that in the event of war with Ukraine, geopolitical trade sanctions won't affect Polymetal's contract for 70% of WMC concentrates).