Power consumption for primary combustion = 0.05h *1.2kW/h = 0.06kW.
Electricity consumption for boiling water for one month =0.06*3*30=5.4 degrees.
The power of a notebook computer is generally 70 watts, i.e. =0.07 kW/hour.
If it is used for 5 hours every day, the monthly electricity consumption =5*0.07*30= 10.5 kwh = 10.5 kwh.
Your monthly electricity consumption for these two items is about 16 kWh.