The following morning they set out with a group of traveling merchants headed to the mountains. Apparently, since Al revitalized the Kanta civilization they had been in charge of all mineral sales and cut out the middlemen.
A law was put in place that fixed the prices so the merchants couldn't buy things cheap and turn around and sell them for exorbitant amounts later. That way the Kanta were paid fairly for what they worked so hard to mine.
They had to work with the traders though because none of the Kanta desired to be traveling merchants. Now that they had their lands back they preferred to stay at home. Plus there were certain items that could not be made in the mountains that had to be bought from elsewhere.
Abby was willing to bet that was Katie's doing. She was trying to modernize the place instead of keeping things primitive and closed off like before.