show that the cost for 45KWh of electricity is R35,94

To calculate the cost for 45kWh of electricity, we need to know the cost per kWh. Let's assume that the cost per kWh is R0,798.

Cost for 45 kWh = 45kWh x R0,798/kWh
Cost for 45 kWh = R35,91

Therefore, the cost for 45kWh of electricity is R35,91.