Answer
Technique 2
Work Step by Step
Technique 2 is the least costly so that’s the one that you would want to use for any price over $2.60$ per bar of soap. At $2.60$, there would be no profits - marginal costs would equal marginal benefits. If soap fell under $2.60$, a new technique not listed would need to be found, as every technique in the table costs at least $13 to make 5 bars of soap.
