Refinery and Chemical factory cost

[colonyan]

I felt it was generally very inexpensive.
As they opens up for many more products, few dozen of each iron and copper seemed very low for cost.
Also the electricity consumption as well.

Well actually maybe cost should alter depending on difficulty setting?
Taking considering that the main point of game is to make people design factory not time grind?
But after all that I felt its little too economical.