Sau Resource Stock Presentation, page-33

"The channel samples shown are ranked by gold >3gram meters to normalize between difference sample widths of the vein taken within the drives."

"Channel sample lines were nominally 5m apart, taken perpendicular across the vein along the accessible development drives."

"Table 2 below highlights average vein grade along the length of the drive between consecutive sample points to produce a total drive interval based upon simple linear averaged gold and silver grades."

Pretty sure that explains exactly what they did and how they determined their results. Did you read the report or just start sprouting your crap after looking at a table?