Commodities of Martian Rails: Iron Rations

Martian Rails (2009), the crayon board game manufactured by Mayfair Games about railroading on the Red Planet in which players build tracks and haul freight, has a long list of cool commodities that players can transport to generate revenue for their rail companies. For example:

Iron Rations -- All intrepid explorers, frontiersmen, and military men have depended on these concentrated, emergency food items to sustain themselves. This is the standard adventurer survival food. Isn’t it curious how Iron Rations are produced in cities that also have Iron Ore?

Martian Rails is loaded with references to Martian SF!