i believe it means that you have to pay the rest of what you owe minus the current months days. meaning if you pay $100 a month at 27 months you owe $2,700, and if you have had the car say 15 days out of this month they will credit the unused days back to you. which would be $50. therefore, you would owe $2,650, plus any dealer fees that they may hit you with to end your lease now. hope that makes it a little simpler.