Higher interest rates won't cost you as much to drive a car as do higher gasoline prices. This is because automobile loans have payment schedules that are only modestly impacted by Federal Reserve Board interest-rate increases. Create a spreadsheet to compare the difference in monthly payments for a $25,000 loan having 60 monthly payments for a select number of interest rates. Use 3% as the base APR and go as high as an APR of 12%. Challenge: Make your spreadsheet flexible enough to be able to look at the impact of the different interest rates for different loan amounts and different repayment periods.