Flattening a twisted part

I've been given a part with a twist(insert favorite M. Night Shamalan joke here). See attachment. There are no bends to be recognized, nor can I insert bends. I need to get this section flattened for production, is there any way to do so, and if not is there a formula I can use to calculate the flat layout? Any help is appreciated.

Vince

SolidworksSheet Metal