Acutally to get the real saving on silicon or Sliver you would...

Acutally to get the real saving on silicon or Sliver you would have to revert back to the polysilicon price per watt based on crystalline wafers.

Polysilicon price = $50 per kg
Wafers per kg = around 60 wafers per kg @ 2.6 watts each

Polysilicon cost per watt = ($50 / 60 wafers)/2.6watts = $0.33 per watt for polysilicn cost used for one wafer..

So the saving at the silicon level for the Silver is what? $0.15 per watt? $0.20 per watt?

The price avantage could be lost at the 1st step from Polysilicon to a Sliver wafer due to process..