If an average household spends $20 in natural gas for cooking per month, how much money would be saved by using a pressure cooker in one year

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The correct answer is $240.

If an average household spends $20 per month in natural gas for cooking they would spend a total of $240 per year. If they choose to stop using natural gas for cooking and replace it with a pressure cooker they would save $240 per year for the natural gas.