A proposal for providing electricity to a small semas town for $40$ yss is being considered by gol't. Than investment costs, operations and maintenauce $($ogin$)$ costs, benejits and diskenejits of the proposal ae as snmmeised in the table below. Using a discount rote of $6\%,$ calculate the net Pesent value git proposal aud defermine whelter its economicaly justijiable.