pake cara yahh tolong banget lagi butuh

25 W x 2 = 50 W x 12jam = 600W
40 W x 5jam = 200 W
250 W x 4jam = 1000 W
=600W+200W+1000W= 1800W
=1800W x 30 hari = 54000 W (54Kwh)
=Rp 1600 x 54Kwh = Rp 86.400