I started on my PI Spreadsheet, to work out what is worth extracting and manufacturing. There are a lot of combinations, so I only got to the end of the Processed Materials list before my eyes glazed over and I gave up on the effort for the day. There were some strange figures in what I did get through. Logic suggests that if you take raw materials and convert them into processed materials, the price of the end item should be more expensive than its ingredients. Instead 5 of the 15 processed materials cost less to buy on the market than the sum price of their ingredients do. Of the remaining 10 processed materials, the mark up was between 3 and 186% over the ingredient price. Hopefully in the end this will highlight what areas of PI I should concentrate on.
I still have to finish off calculating the prices of the Refined Commodities, Specialized Commodities and Advanced Commodities.