Problem $05\mathrm{.}087-$ Find the allowable load for the unsymmetric cross section with the given allowable stresses in tension and compression

Determine the largest permissible value of $P$ for the beam and loading shown, knowing that the allowable normal stress is $+6\mathrm{.}4$ ksi in tension and $-18$ ksi in compression. $($Round the final answer to two decimal places.$)$

The largest permissible value of $P$ is kips.