If you're like me (and my condolences if you are), you might find it laborious to keep track of which people (or chests) want which items, and what the reward for the trade is. (Spoiler alert: the trades on the Mobi Bridge are essentially you giving away things for practically nothing.)
I created an .xsls file that tracks the locations of trades more complicated than simple purchases, the components necessary to complete the trade, and the result of the trade. The worksheet has three tabs:
- Location-Specific: This (generally) locates the people or chests that trigger the trade, what you must give, and what you get. I also added instances where Mii can prostitute herself in exchange for gold or crafting materials.
- Blacksmiths: This identifies the full cost of the katana upgrades as well as the full cost of the Dark Magic Stones, Light Magic Stones, Dragon Magic Stones, and Mara Magic Stones.
- Cowmen: This identifies the synthesized items that the cowmen can create, as well as the cost and components for each item.
One final note: Don't make the mistake that I did by neglecting the accessory shop by the lake. In addition to having trade-essential items (i.e., Ring of Action, Gloves of Precision), it sells accessories that make grinding easier (i.e., increased gold drop, increased EXP).