How can I use the 30/360 interest calculator in Excel to determine the total interest accrued on a loan or investment?

To use the 30/360 interest calculator in Excel, you can input the loan amount, interest rate, and the number of days to calculate the total interest accrued. Excel will automatically calculate the interest based on a 30-day month and a 360-day year, providing you with the total interest amount on the loan or investment.