A crew ran a precise level loop beginning at a benchmark on the bottom of a USGS $\frac{71}{2}$ minute map at a latitude of $30{30}^{\text{'}}$ to a point at the top of the map. The elevation of the benchmark is $120\mathrm{.}751$ meters. The difference in elevation between the benchmark and the point was computed to be $1420\mathrm{.}95$ feet. Calculate the orthometric correction necessary before the spirit$-$leveled elevation at the top of the map can be used as a benchmark.