Foreword notice: As some of you may be aware, the author uses slightly different kanji for famous people from Ishen, since it’s not really translated into English, we just leave kanji next to those names, where it’s applicable.
In regards to the money conversion ratio:
There are 6 types of money used throughout the story (currently):
bronze -> copper -> silver -> gold -> platinum -> royal gold
Each next level costs 10 of the previous level. The was a typo of #193 about paying the amount to go through the transfer gates, it will be fixed at later date.