Keluarga Pak Parjo menggunakan 4 buah lampu masing-masing 25 watt, TV 100 watt, dan kipas angin 50 watt. Setiap harinya peralatan tersebut digunakan selama 10 jam. Jika tarif listrik Rp.300,-/kWh, maka biaya listrik yang harus dibayar Pak Parjo setiap bulannya (30 hari) sebesar ....
A
Rp. 22.500
B
Rp. 12.000
C
Rp. 7.500
D
Rp. 23.000
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