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 ...