Nimeruuk tells you, "Happy to meet you, human! Do you seek the prized Tiriun Mushroom? Very useful! I take trade notes for Tiriun Mushrooms and Ginger! I will give you one Tiriun Mushroom for a D note and five Tiriun Mushrooms for a MMD note. If you want Ginger, I will give you one Ginger for a CC note and five Gingers for an M note. Yes, I collect trade notes to do business with the glorious mercantile company, Ketnan's Trading Enterprises!"