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Use this formula to arrive at the wattage used. W = A x V. Now figure out how many hours there are in a month. Days (30 or 31) x 24 (or the number of hours the appliance is on per day) will give you this answer. Take that answer and multiply it by 9 cents or .09 for your answer.

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13y ago
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Q: How much does a 110 volt 12 amp appliance cost per month with 9 cents per kWh?
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