A perfect cube with sides of 9.0cm is placed so that one corner is at the origin and its faces are parallel to the coordinate planes, in such a way that the cube is in the positive region for each coordinate. The electric field in this region is given as E = [(6.0x + 3.0y)i - 4.0k], where the field is in units of N/C. Find the total flux through the cube and the total charge located within the cube.