Help with formula

Hello,

Does anyone know how I would substitute a Measure called "Currency"  rather than use a column in the Transactions Table called CCURNCYID

Revalued Balance (USD) =
SUMX ( 
 ADDCOLUMNS (
        SUMMARIZE (
         Transactions,
         Transactions[CCURNCYID]
  ),
        "Revalued Partial", CALCULATE ( SUM ( Transactions[BalanceCalc] ) ) * [Exchange Rate]
 ),
 [Revalued Partial]
)