It's really a good script.
Just a few issues I have:
1) Why is BarsNeeded:=26 on a lot of them? Such as gold bracelet, I know for sure you can have 27 gold in your inv + the mould.
2) Needs to click to continue, probably in function issmelting would be best.
3) Cannonballs wouldn't be hard to add and would be very exciting.
4) Speed after walking to furnace could be sped up a bit. I see it walks there then waits a few seconds before clicking the stuff in your inventory. Could give more xp/h.
Other than that, script is pretty flawless, nice work.
Dunno how much the profit is nor do I really care, I'm just trying to get the insane reqs for Livid Farmer... make a farming script next so I can get 60 farming (currently 55)
Edit: it NEEDS an antirandom check while smelting, I think IsSmelting would be a good place to add. Else it sits in random forever. Also, upon relogging after a break, it keeps trying to find the AlK furnace in an invalid location - where the X is in this screenshot is near where it was hovering around like mad
http://i.imgur.com/i73Lj.png .. I think it assumed my crosshair was North, but the antiban changed my crosshair like that and it sat there for a long time until I manually fixed the compass at which then it instantly found the furnace. :/