st of land: $$2$ million.

Probability of rezoning: $0\mathrm{.}40.$

If the land is rezoned, there will be additional costs for new roads, lighting, and so on$,$ of $$1$ million.

If the land is rezoned, the contractor must decide whether to build a shopping center or $1,400$ apartments that the tentative plan shows would be possible. If she builds a shopping center, there is a $60$ percent chance that she can sell the shopping center to a large department store chain for $$4$ million over her construction cost, which excludes the land; and there is a $40$ percent chance that she can sell it to an insurance company for $$4$ million over her construction cost $($also excluding the land$).$ If$,$ instead of the shopping center, she decides to build the $1,400$ apartments, she places probabilities on the profits as follows: There is a $40$ percent chance that she can sell the apartments to a real estate investment corporation for $$2,500$ each over her construction cost; there is a $60$ percent chance that she can get $$2,300$ each over her construction cost. $($Both exclude the land cost.$)$

If the land is not rezoned, she will comply with the existing zoning restrictions and simply build $630$ homes, on which she expects to make $$4,000$ over the construction cost on each one $($excluding the cost of land$).$