Cost of Running a PC 24x7

[robbinghood]

400W ?? Its the specification of PSU, no home PC's will consume that much power.My PC takes only 117W when in Idle and 260W in load (gaming).I monitor that in APC powerchute software.My guess would be an average 100W x 15hrs for his PC.So 1.5 units per day and 45units per month.So the bill would be around 135/- if the price per unit is taken as 3/-

Now the price per unit in my area is Rs 4.20