Tried the Sandbox version, so is it 3 common cut up wood for 3 copper ores? And does it take more wood the higher tier of metal you have. Just wanna get a head start on the next update : ) Tin takes a long time to buy right now, making 4$ profit for each weapon you make. Been playing a few hours, made a 100$ profit so far. Got my Charisma up to 4, and it's day 8. Starting to get less and less time for each order.
Edit: 1 Uncommon firewood can smelt ores for a while, like a minute or so. I threw in like 7 Iron ore, 3 copper ore, and 1 admantite ore. All smelted with 1 firewood. Guessing it's a time limit kind of deal