Sabi Gold Mine desires to construct a gold leaching tank with a capacity of $1500$m$3$

to increase

the leaching. The company has built a $600$m$3$

tank $15$ years ago when the approximate cost

index was $210$ and the cost of constructing the tank was R$700000.$ The current cost index is

$800$ and the cost$-$capacity factor for the gold leaching tank is $0\mathrm{.}5.$ Estimate the cost of

constructing a $1000$m$3$ gold leaching tank