Help with Variables in XI?

I have a calculated value on a record. Is there a way to return that value to the next record like below?
Record 1 : $300,000 $100,000 $200,000 {300,000-100,000}
Record 2 : $200,000{from above} $100,000 $100,000 {100,000-100,000}Try the function "Previous"