Question: Consider a refrigerator that consumes 320 W of electric power when it is running. If the refrigerator runs only one quarter of the time and

Consider a refrigerator that consumes 320 W of electric power when it is running. If the refrigerator runs only one quarter of the time and the unit cost of electricity is $0.09/kWh, the electricity cost of this refrigerator per month (30 days) is
(a) $3.56
(b) $5.18
(c) $8.54
(d) $9.28
(e) $20.74

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