https://github.com/21hackers/git-money/issues/184
Instructions are in the link above - pretty straight forward stuff.
Two things are needed to get paid for this [bitcoin wallet + github account]
When you submit the work via pull request and we accept it you will be paid. If youve met the requirements (as in the listing - boom you get paid!!)
Let me know if you have any issues etc. Shouldnt take too long!