Answer:
Total charge for wooden pedestal will be $1136
Explanation:
Volume of the pedestal will be = volume of cube + volume of the cone
= (Side)³ +

= 10³ +
![(1)/(3)[\pi ((10)/(2))^(2)(7)]](https://img.qammunity.org/2020/formulas/mathematics/middle-school/2rsj1li8iuez01amkq1vx7px0wyfnmry94.png)
= 1000 +
![(1)/(3)[\pi 5^(2)(7)]](https://img.qammunity.org/2020/formulas/mathematics/middle-school/3jappidc6lax7rli5a52wodxr4vvs5sfwh.png)
= 1000 +
![(1)/(3)[\pi (25)(7)]](https://img.qammunity.org/2020/formulas/mathematics/middle-school/s6vz0wf8yunpipd42ov5iv7yy78qqa1zvp.png)
= 1000 +
![(1)/(3)[(3.14)(25)(7)]](https://img.qammunity.org/2020/formulas/mathematics/middle-school/52zcwbz3pgvxc2jdh8vjkdv5i2owacgojo.png)
= 1000 + 183.17
= 1183.17 cubic inch
Total volume of 12 wooden pedestals = 12 × 1183.17 = 14198 cubic inch
Since charges of the wood is $0.08 per cubic inch
So total charges for pedestal will be = 0.08 × 14198 = $1135.84 ≈ $1136