I think it would be a good idea to put a few more things into the code for the Trade Ministry.. such as TRADE BUY and READLOG TRADE.
TRADE BUY would make things a bit less frustrating by allowing gold to be transfered directly from the Trade Vault to the Comm Shop being used. It would make an entry in the READLOG TRADE about what was bought at how much for what total.
The Comms could be automatically sent to the Warehouse, or could still be put into the agent's inventory to be put into the warehouse manually.
Really, just a time saver, as well as for security and records.