I have logged receipts of my gas consumption around 2011-1012 and I have a spreadsheet with Galons and price. I also continued to log until 2024 so I know the mileage I used during this period. I use both speadsheets to estimate how much I spent on gas during the last decade.

Where we verify, using R, that 2025 = 1^3 + ... + 9^3