Proposal: Increase tech cost of certain key technologies

[jodokus31]

I feel, that certain key techs are too cheap. Compared to some of the vanilla techs or smelting techs, they don't feel very valuable, but are quite important.
This is a list of examples, which is not complete:

Plastic/Resin 1/2/3 only 50
Chemical refining only 80 packs
Advanced ore refining 2/3/4 only 50
Advanced chemistry 1/2/3/4 only 50
Advanced electronics 3 only 100 packs
...