Science & Industry

Hello lovely EVE Forums,
I have an industry question regarding the "Total Job Cost" of producing in any NPC station.

EVE prides itself on free market enterprise. When I choose to produce, let's say, 1 run of Heavy Scourge Missile, I will see that x100 Heavy Scourge Missiles have a "Total Estimated Price" of approximately 7,000 ISK, depending of course what market region I am in. (In this example I am using the Kador region).

I will also see the "Total Estimated Price" of the Tritanium and Nocxium based on the regional market. In this way, I can compare and see if I will make money. (My apologies for the obviousness of this post so far. I wish to be fully clear of the entire process).

Finally, there is a "System Cost Index" (correct me if I am wrong, this can be manipulated by Incursions or Null Sec PvP otherwise it is standard and unchanging in Empire Space. For example, in Finid manufacturing, it is 1.47%), and a "Facility Tax" (Question: Is Facility Tax only for NPC station production? Can it be modified from 10%?)

What I do not understand, and the purpose of this post, is from where does the "Base Item Cost" derive itself from? Furthermore, what is the function of "Base Item Cost?" (Other than to set a standard number in order to tax manufacturing).

Thank you for reading this post and/or responding to my questions.

Thank you so much. I had a feeling I was asking a question already asked.