Physics-about volume (density and bouyancy)..help?

Block A hangs by a cord from spring balance D and is submerged in a liquid C contained in beaker B. The m of the beaker is 1.20 kg; the m of the liquid is 1.80 kg. BAlance D reads 3.25 kg and balance E reads 7.75 kg. The volume of block A is 3.80x10^-3 m^-3.