u/Archimides_Overflow

(May contain errors. I need sleep)

10k to install any found upgrade module.

150k to upgrade Advanced to Superior.

300k to upgrade Superior to Exceptional.

25k for each roll at legendary #1. 75k to pick one after 5 rejected random rolls. 200k total.

50k for each roll at legendary #2. 150k to pick one after 5 rejected random rolls. 400k total.

100k for each roll at legendary #3. 300k to pick one after 5 rejected random rolls. 800k total.

120k for legendary #4, pick one; no random roll required.

Total cost is from 755,000 (if you accept all first rolls) to 1,980,000 (if you reject all random rolls).

I didn't bother tracking x-tech cost.