The illustrated system is in equilibrium. The geometry is defined by d$1=3\mathrm{.}6$ m$,$ d$2=4\mathrm{.}8$ m and d$3=3\mathrm{.}2.$ Spring AB has a stiffness of $32$ N$/$m and a rest length of $2\mathrm{.}6$ m$.$

Calculate the mass of the box at point D$.$ Indicate your answer in kg and with a maximum of three decimal places.