tolong dibantu caranya saja

Lampu :
Wbulan = 6 . 1000 = 6000/30 = 200
Thari = 8 jam = 200/8 = 25

Televisi :
Wbulan = 22,5 . 1000 = 22500/30 = 750
Thari = 5 jam = 750/5 = 150

Setrika :
Wbulan = 12 . 1000 = 12000/30 = 400
Thari = 2 jam = 400/2 = 200