"Actually we use credits.  There's a big...abacus, called a computer, that automatically adds how much money we earn from work to our bank, then subtracts what we spend.  We usually only carry a cred stick, like this..." She pulls a 5 inch long, 1/2 in diameter 'wand' from her utility belt.  "...to handle our buying, selling and contracts.  We can buy gold when we need it.  It also has our ID and a flashlight, but also doesn't work here.  But I'll see if anyone is able to exchange currency once we find the outpost."