Answer
Technique 3
Work Step by Step
If every resource is $1$ per unit, technique 1 would cost $7$, technique 2 would cost $7$, and technique 3 would cost $8$. Therefore, technique 3 would be the least profitable.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.