How do I calculate how much I spend on gas a month?

Question

How do I calculate how much I spend on gas a month?

Answer 1

Just write down how much you pay each time you get gas.  At the end of the month total it up, and do that for a few months and you can average them together.  

Answer 2

Keep a log book..

Answer 3

use wellsfargo as your bank  and always use your debit/credit card they track all of that