I'm not sure what
soit means in the following sentence:
Environ 10 milliards de roupies népalaises, soit l’équivalent de $135 millions doivent encore être échangées.
As far as I can understand, this is what it's saying:
About 10 billion Nepalese rupees, which are equivalent to 135 million American dollars, still have to be exchanged.
The thing that I'm not sure about is the word
soit. I don't really understand why it is there. How would you describe its usage, function and meaning as used in this sentence?