The Trade Office is located south of The Dead Horse. The entrance is behind the merchant who visits on . The merchant will visit at sunrise to take crates from the pallets, and at sunset to take more crates. Try to capitalize on both.
It is available after completing the merchant's quest "Trade Licence".
Workbench
Here, you are able to build pallets and marketing campaigns.
Trade Report
The trade report details the copper and silver you've earned selling your crates of produce. Silver and gold star crates always sell for the same prices, regardless of what produce you package.