Thank you for sharing.

I suggest some simplification is in order, particularly for your value units. The three divisions (copper, silver, gold) are broad and ignore a lot of factors but allow for rapid conversion. Converting from your iron unit is difficult. Perhaps you can have the bulk of your tables in the three division currencies and have a separate table(s) for converting to other currencies?

The weights are difficult but important. 1 pound of rubies is very expensive and I don't think your chart accurately reflects this.

Formatting to make the charts more readable (as you plan to do) is definitely going to be a huge step forward.

There are non-apparent reasons for some price differences. A dagger, for instance, might contain more steel and take more skilled labor to produce than a cast and welded battle-axe. A dagger is more expensive than a knife because it's all steel versus a utility knife which is iron with a thin sliver of steel plate welded to it (or embedded in it).