tolong no 38 dengan cara

Kulkas : 1 x 150 x 24 = 3600 Wh
Lampu 1: 4 x 10 x 10 = 400 Wh
Lampu 2: 2 x 20 x 5 = 200 Wh
Setrika = 1 x 200 x 4 = 800 Wh

3600 + 400 + 200 + 800 = 5000 Wh
5000 Wh = 5 KWh

(5 x 30 x 2000) + 20.000 = Rp. 320.000,00