The pulp density of flotation feed in a mill is averaging 37 % solids by weight. The ore has a moisture content of 6 % water. The concentrate grade is 25 % Cu, the tailings grade is 0.06 % Cu and the feed grade is 1.37 % Cu. The tailings leave the flotation circuit at 41 % solids and are pumped to a tailings dam. The concentrate slurry leaves the flotation circuit at 22 % solids by weight to be dewatered in a thickener and filtration plant. Final concentrate filter cake is 15% water. If 90% of the water contained in the tailings slurry is ultimately recovered for recycle and if all of the water from concentrate dewatering is recovered for recycle, how much fresh water per ton of ore must be used by the mill? (Hint: Water Balance, Solid Balance, and Cu Balance)