So I know we can convert lower types of mojo dust to higher, 10 white for a yellow, 15 yellow for a pink. Maybe it could be added to convert the other way around? Say, convert a pink to 12 yellow, and a yellow to 8 white. Only an 80% conversion rate, so you can't just go back and forth all the time, but enough that if you're lucky enough to have a surplus of the higher types, but don't have the lower, you can still get what you need.
