Resupply Station
This station offers resources and crafted items, such as tracks, torpedoes or dynamite.
This station is unique to 
Underground Unit Biome.
Each station contains 4 
Carriage Wagon loaded with various items, such as
Regular tracks,
Brake tracks,
Regular torpedo, Bridge torpedo,
Dynamite,
Compressed wood,
Compressed iron.
The type and the number of items on each wagon is random. As such, the price of the wagon also varies (ranging between 
10 to 15).
Unlike the other stations, the difficulty has no impact on the items being offered.