Regret table

Could you please tell me which of these is right:

Project 1 project 2 project 3
Contributions: (100) (300) (600)

Regret table:
Project 1 project 2 project 3
(500) (300) 500

I wrote figures from my mind.Is my logic correct: best option would be to choose project 1 as it is least to loose, therefore if we choose it, we gain 500 in compare with project 3.The same applies to other two.

Or:

Regret table:
Project 1 project 2 project 3
0 200 500
Logic:if we choose project 1 we don’t regret for anything therefore it is 0, then project 2 is 200 worse (300 less 100),the same about project 3.