This idea is to replicate the XCR formula used in Management Reporter for variance calculations in Account Schedules.
Issue:
Revenue: Actual $100 Budget $50 Variance = $50
Expense: Actual $100 Budget $50 Variance = ($50)
Issue: there is no way to do this in Account Schedules.

Resolution: XCR command in MR.
If the row is set to "show opposite sign" then the formula sign for the column gets reversed.