The correct option is C
Explanation:
The annual profit increase = $400,000
The following formula is to be used in order to calculate the total profit enhancement in five years
The total profit increase in 5 years = 400000 multiply with 5 = $2,000,000 = $2 million , As compared to cost of $1 million.
Thus, The correct option is answer (C) 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).