I tried to open them with Open Office. The "C2C Building Techs" seemed to work but the "C2C Tech Columns" did not.
I am still confused on what I am suppose to do with these.
Is it like ...
# Value = X Column = Tech in Column = Building in Tech
Thus # Value = That specific Building
Seems like a lot of conversions just to figure out what it should cost.
So basically we just need to go down the list right? Because not all values are that far off and can be around the ideal value at that point in the tree. Also buildings families would have similar costs despite where they sit on the tree. Furthermore buildings are not listed in alphabetical order so it takes longer to find out where the building data is located in the mod. Be it in the core or in one of the many mods within the mods. Not only by different people but by different mods within a mod. Sometimes with different people influencing the same building such as with Project Hades overwriting other mods.
In addition you lists seem to be indiscriminate in where and what buildings/tech you have. There are many on the list which are under X30 and thus just make more information that their needs to be. Likewise you have techs of the galactic era which as you said before do not need to worry about yet.
In addition you also list buildings that cannot even be built such as Myth of the Bear or Housing (Igloo). These buildings do not need their cost adjusted by tech because they are not built with hammers.