Light with intensity $100$ W$/$m$^2$ shines at an angle of $90\backslash$deg onto a solar panel attached to the International Space Station. The panel material has a refractive index of $2\mathrm{.}40$ and an absorption coefficient of $0\mathrm{.}0600$ mm$.$ The panel is $4\mathrm{.}00$ mm thick and has an area of $20$ m$^2$

How much energy is reflected from the panel in $60$ minutes? $($Answer in kj$)$