From "notorious" 36 page report on page 2, Silverado was using an antimony cost of $4/lb with a value of contained antimony 0f $187,200,000 @ price of $4/lb. at 40% Sb/ton recoverable at 85% of total tonnage of 320,000 tons of ore.

DISCLAIMER: Of course a new NI 43-101 has been issued since this report of 1/11/2011. (Refer to press release of July 26th, 2011) located above under "Press Releases"