Given the leveling notes below, calculate the elevation of Benchmark $4.$ Calculate the difference between the sum of the backsight and the sum of the forsight and verify that this value is the same as the difference in elevation. $(8$ Pnts$)$

$\backslash$table$[[$Station$,$BS$(+),$HI$,$FS $(-),$Elev$],[$BM$3,8\mathrm{.}42,,,444\mathrm{.}34],[$TP$1,11\mathrm{.}56,,1\mathrm{.}20,],[$TP$2,6\mathrm{.}15,,1\mathrm{.}35,],[$TP$3,4\mathrm{.}39,,10\mathrm{.}90,],[$BM$4,,,5\mathrm{.}94,],[$SBS $=,,,,]]$