Electrum is the name given to Au-Ag alloys when Ag exceeds 20wt%. Determine the density of electrum with exactly 20 wt %Ag. If the market price of Au and Ag are $400 per ozt and $7 per ozt respectively, what is the value of this electrum on a per ounce basis? [Density of pure Au = 19.3 g/cc, density of pure Ag = 10.5] g/cc.