Charles Bukowski - American author

I remember this being mentioned as a sideline in some other thread, but can't find now.

Do we have confirmed information about how much money Bukowski made working as a postal clerk from 58 - 1970? How high his salary was and how much that would be in todays money?

I remember him writing somewhere in the letters that his child support was 45,- and the rent 75,-. Is this possible?

Thx.