Consider the Three Mutually Exclusive Alternatives Below

Consider the three mutually exclusive alternatives below. Determine which alternative is preferable at an interest rate of 9% per year. $\begin{array}{|l|l|l|l|}\hline \text { Alternative } & \mathbb{M} & \mathbb{N} & \mathbb{P} \\\hline \text { Capital investment } & \$ 400,000 & \$ 4000 & \$ 150,000 \\\hline \text { Annual expense } & \$ 189,000 & \$ 94,500 & \$ 134,000 \\\hline \text { Annual revenue } & \$ 309,000 & \$ 194,500 & \$ 234,000 \\\hline \text { Salvage value } & \$ 65,000 & & \$ 130,000 \\\hline \text { Life, years } & 24 & \mathbb{} & 12 \\\hline\end{array}$