In reference to the figure shown below and using $b=8\mathrm{.}8in,d=19\mathrm{.}8in,M_y=-21\mathrm{.}6$kip$-ft,$ and $M_z=-22\mathrm{.}4$kip$-ft,$ compute the stress at point $A.$ Express your answer in ksi using three $(3)$ digits after the decimal point.