MUUN

"Muuns were a thin, tall humanoid species from the mineral-rich planet of Muunilinst, which was also the headquarters of the InterGalactic Banking Clan, the largest banking organization in the galaxy. Muuns were known throughout the galaxy for their excellent financial and mathematical skills, and, seeking economic stability, the Empire exempted Muuns from their wide-spread non-human persecution, in order to utilize Muuns and their economic finesse." Wookieepedia, The Star Wars encyclopedia