5 blue belts copper plates. 1.2 blue belts plastic, 0.6 blue belts steel input https://kirkmcdonald.github.io/calc.html#data=1-1-19&rate=s&min=3&p=coal&belt=express-transport-belt&dm=p3&db=s3&dbc=16&items=low-density-structure:r:15&ignore=steel-plate,copper-plate,plastic-bar