Sally- You would have to cast the bronze first. Clean up the casting
and the re-invest and re- cast with the silver.
I think that you'd off set any savings in materials costs by
increased labor costs.
I wouldn't worry too much about metals prices. A. What goes up will
come down. Like gold did yesterday by over 100 bucks. B. Always
keystone your materials costs. 2x40 bucks is a lot more than 2x10
bucks. You make more money. If your clients complain, find richer
ones that appreciate your work more.
Remember what we do is Magic. If it was easy everybody would do it.
Have fun and make lots of jewelry.