The cost, density and resistivity of copper, steel and aluminium

Copper:

Cost = 2.13 USD/lb, Resistivity = 1.7*10⁻⁸ Ohm meter, Density:8.96 g/cm³

Steel:

Cost = 17 USD/tonne, Resistivity = 10*100*10⁻⁸ Ohm meter, Density: 7.60 g/cm³

Aluminium:

Cost = 0.67USD/lb, Resistivity = 3.2*10⁻⁸ Ohm meter, Density: 2.70 g/cm³