“To calculate your own minimum, you’ll need to consider your monthly expenses and your income,” he said.

How to Calculate Operating Expenses in Excel. An Excel spreadsheet is designed to automate the task of repetitive calculations. It can be an invaluable tool for ascertaining the income, capital ...

This formula will calculate the monthly payment, multiply it by the number of payments made and subtract out the loan balance, leaving your total interest expense over the cost of the loan.