Eight charges , 1 muC , -7 muC , -4 muC , 10 muC, 2 muC , -5 muC, – 3 muCand 6 muC are situated at the eight corners of a cube of side 20 cm. A spherical surface of ardius 80 cm encloses this cube. Then , the total outgoing flux from the spherical surface ( in units of Vm ) is