cara nomor 16 gimana rumusnya???btw itu yang di coret² abaikan saja,nyoba² tapi gk dapet

E 4 lampu = 4(25 W)(12 h) = 1200 Wh = 1,2 kWh
E setrika = (350 W)(2 h) = 700 Wh = 0,7 kWh
E 2 kipas = 2(120 W)(5 h) = 1200 Wh = 1,2 kWh
E kulkas = (120 W)(24 h) = 2880 Wh = 2,88 kWh
E tv = (110 W)(4 h) = 440 Wh = 0,44 kWh
ΣE = 6,42 kWh

Biaya selama 30 hari = (6,42 kWh)(Rp 1500)(30)
= Rp 288900