Willa and Westley are siblings who built a hair salon business from the ground up. They are now contemplating opening an additional salon location. The estimate to open an additional salon would mean adding $1 million in expenses with their profit increasing by $400,000 each year for the next 5 years (all other things equal). Willa and Westley decide: a. to take on the new salon because the expected marginal benefit ($2 million over 5 years) is greater than the estimated marginal cost ($1 million).
b. to not open a new salon because the marginal costs prove to be too high.
c. to open a second salon because the marginal cost of the new salon is low compared to other similar projects.