A metal fabrication company is pricing raw supplies of aluminium.The following are the costs to the company to receive one tonne of aluminium from various sources. Which source offers the best price for aluminium per tonne?

Please always start your own thread for your question instead of tagging onto someone else's.

Is this homework or real life stuff? You seem to have something missing. There's no "following" anything. And really, unless someone just coincidentally works somewhere that purchased aluminum, I don't see how anyone would know the best prices. They would just have to do a search, like you could do. And prices are not always the same for every situation anyway.