If you're making steel bars, which it sounds like,using superheat, here's the cost of the supplies: SUPPLES: coal=193gpx2(medium price today) iron=97gp(medium price today) nature=263gp(medium price today) -The supplies cost on average 746gp.(watch out though the price could suddenly sky-rocket) -Steel bars cost 668gp atm and rising/lowering. -So you lose around 78gp every steel bar -I suggest you mine some of your own ore (i also suggest coal since it's the most expensive in ore and you need double,but you can also mine iron since iron mines fast) that way you can get more proffit. -So you'll be getting magic xp,smithing xp,and mining xp(if you decide to mine some of your own ore like i suggested)which sounds really good. I hope I helped you some, -skillerman84