baseprices (what you call eiv) are always based (since Crius):
- for manufacturing: on the product you are currently building
- for invention (since reverse engineering is now invention, it’s the same): on the output blueprint product
- for research: on the current blueprint product
To these baseprice, you need to apply industry index for the given job in the given system, taxes for manufacturing (station / structure taxes, corp taxes etc) or a “job” multiplier (for research/invention, that 2%).
That’s all what you see in the industry window (more informations about these formulas)
if you want to calculate the baseprice yourself: it’s the sum of the products between component quantity and component adjusted prices (these can be found here)