Bank of $E(BoE)$ is planning to build a new branch on land it already owns. The land was purchased several years ago for $$250,000.$ Recently, BoE was offered $$350,000$ for the land. BoE estimates that if they build the branch, it will create NPV $=$$$400,000.$ BoE did not consider the valued in this NPV calculations. Given this information, what is the opportunity cost to BoE of building the proposed branch?

$$250,000$

$$40000$

$$350,000$

$$100,000$

$$50,000$