Question 37171
We will calculate the volumes of the cylinder and hemisphere separately, then add them.

V(cyl) = (pi)r^2h = (pi)(3^2)(4) = 36(pi)

V(hemi) = .5(4/3)(pi)r^3 = .5(4/3)(pi)(3^3) = 18(pi)

Total volume is 54(pi) = 169.56 cubic mm

Now multiply by $16 per cubic mm and the answer is

169.56 x 16 = $2712.96

And you wanted a gold filling!  Yikes!