This is a very simple Excel file. You can use it when negotiating price at the car dealer.
Sales people will give you options: monthly, bi-weekly, 5 years, 6 years, different interest rates, etc. But typically they will not tell you the total cost for you.
The total cost is what you will pay to the bank over the course of the loan. Initial fees (if any), plus regular payments, plus end of the term payment (if any). Why is this important?
Example: my monthly payment may be lower in a certain option but if I will pay more in total over the course of the loan – this will be my loss and bank’s win.

Anyway this file let’s you quickly compare options if you bring your laptop to the dealership.

You can also use free MS Excel app on your phone. Download MS Excel app from Apple Store or Google Play Store. It’s not as convenient as regular Excel. But this file is mobile screen friendly.