Problem $12\mathrm{.}004-$ A spring scale and a lever scale

A spring scale A and a lever scale $B$ having equal lever arms are fastened to the roof of an elevator, and identical

packages are attached to the scales as shown. When the elevator moves downward with an acceleration of $2\mathrm{.}500\frac{m}{s^2}$

the spring scale indicates a load of $66$ N $.$ Assume $g=9\mathrm{.}81\frac{m}{s^2}.$

Problem $12\mathrm{.}004.$a $-$ Weight of the packages

Determine the weight of the packages.