Assuming there is a troy oz in your raw material. I don't know how much silver remains in the developed film. I also don't understand how the machine pulls the metal out of the film, and that's just the coludition (sp?) that contains the image -- the bulk of the mass of the exposed film is a tough polyester sheet, and that's just wasted mass for your application. But it appears the machine can handle it.
I tried to play with this when I was a kid, I would try to attack film with acid, and collect what I got. I would strip the "film" off the polyester strip rapidly, but I don't know how much metallic silver was in it. I used HCl, so however much it was, it was insoluble anyway, and I couldn't get nitric acid when I was a kid.