Not sure why "what the average person spends per month" is relevant here. When creating your budget, you need to take your own specific situation into account. This number will vary widely from person to person.
My wife and I have 2 cars. We drive 15K miles/year combined and average 35 mpg, which comes out to 35 gallons per month.
My wife and I have 2 cars. We drive 15K miles/year combined and average 35 mpg, which comes out to 35 gallons per month.
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