An Activated Sludge Plant Cost $75 Million When It Was

Short Answer

An activated sludge plant cost $75 million when it was built in 1995. The detailed cost breakdown is given below. Determine a weighted index for the construction of a similar plant in 2009. $$\begin{array} { l | c | c | c } \hline \text { Cost Element } & \text { Percent } & \text { Index } ( 1995 ) & \text { Index (2009) } \\\hline \text { asibility study and design services } & 5 & 65 & 105 \\\hline \text { bor } & 30 & 170 & 226 \\\hline \text { aterials } & 40 & 180 & 227 \\\hline \text { uipments including installation costs } & 25 & 105 & 137 \\\hline\end{array}$$