Determine the Minimum Cost Life of an Equipment for Which

Multiple Choice

Determine the minimum cost life of an equipment for which the marginal costs are given in table below. Use an interest rate of 10%.
$$\begin{array} { | l | l | l | l | l | l | l | } \hline \text { Year } & 1 & 2 & 3 & 4 & 5 & 6 \\\hline \text { Margiral Cost, } \$ & 18,000 & 16,000 & 19,000 & 20,000 & 22,000 & 24,000 \\\hline\end{array}$$

A) 6 years
B) 4 years
C) 2 years
D) 3 years