Go back and read the posts. When someone changes the cost index and you see it’s going to add 400 lbs more of fuel, do you express that in pounds or dollars? Do you know the price of fuel your airline was charged for at that airport? Do you know if your airline singed a fuel contract at a fixed price for that airport? Do you know if your airline gets a rebate at the end of the year? I just find it hard to believe that a pilot on here actually knows when another pilot made a $500 mistake. The price of fuel is too opaque to measure such a small amount.