Odpowiedź:
P = U * I
P = 230V * 2A = 460W
P = 460W = 0.46kW
W = P * h
W = 0.46kW * 150h = 69kWh
1kWh = 0.50zł
69kWh = 0.50zł * 69 = 34.50zł