How much gold would you guess could be in (1) Western Electric Dimension cabinet w/ 5 shelves full of cards?

I have about 15 large cabinets (System 2000) and 6 small cabs (Dimension 100 I think) full of cards, 10 Horizons full and enough cards to build another 6-8 systems plus tons of ITT 1A2 systems. :shhh: