Answer:
The answer is "$10.12 million"
Step-by-step explanation:
To find the price of the 36 dock doors only at the current rate, just use the cost index.
![C_n=C_k * ((I_n)/(I_k))\\\\](https://img.qammunity.org/2021/formulas/engineering/college/6uxczg79up2m1lhp1jkz7e77s8gaz2gg5x.png)
![= 6 * (195)/(140) \\\\= \$ \ 8 \ million](https://img.qammunity.org/2021/formulas/engineering/college/leav8u8rn3b703fp1gtbe9hnfalf52qgfa.png)
Its current cost of 36 dock doors is, thus,
. To calculate the price for 48 dock doors, just use the second formula now:
![\to ((C_A)/(C_B))=((S_A)/(S_B))^(X)\\\\\to C_A=C_B * ((S_A)/(S_B))^(X)\\\\](https://img.qammunity.org/2021/formulas/engineering/college/fcbbhg43lxxpf41d2vrkuv0f7y8aj93446.png)
![=8 * ((48)/(36))^(0.82)\\\\= \$ 10.12 \ million](https://img.qammunity.org/2021/formulas/engineering/college/nc2tgojbz53gaskzhg46k1765lh9xsrdzw.png)