A total station is set up over point $"$BM $-$ B$"$ and a zenith angle of

$87{28}^{\text{'}}{16}^{\text{'}\text{'}}$ to the top of a flagpole. The horizontal distance from

$"$BM$-$ B$"$ to the flagpole is $476\mathrm{.}18$ feet. The H$.$I. of the total station is

$5\mathrm{.}43$ feet and the elevation of $"$BM $-$ B$"$ is $237\mathrm{.}58$ feet. What is the

elevation at the top of the flagpole? $($You must draw a sketch below

to support your answer$).$

Elevation Top Flagpole