Eight charges, $1\mu C, - 7\mu C, - 4\mu C,10\mu C,24\mu C, - 54\mu C, - 34\mu C$ and $64\mu C$ are situated at the eight corners of a cube of side $20\,\,cm$. A spherical surface of radius $80\,cm$ encloses this cube. The centre of sphere coincides with centre of the cube. Then the outgoing flux from the spherical surface $\left[ {{\rm{in}}\,\,{\rm{units}}\,\,Vm} \right]$ is