7-9kWh is what mine is on average: 2 geysers; 3TVs' on standby; 1TV on; PC on standby; router on and about 200W lighting all night.
My average cost pm is about R450-R600 depending on how much we use the 2 ovens. Having a gas hob does help. The washing machine, huge automatic, runs nearly every day as here is a two-year old.