Dynamic DAX

Anonymous , Check this I have updated the Total

dax
Measure =
VAR CurrentGP = ROUND([Ext. GP%], 10)
VAR PreviousGP = ROUND([Ext. GP% PY], 10)
VAR Sales = ROUND([Ext. Sales], 0)
VAR EQN = (CurrentGP - PreviousGP) * Sales
VAR SelectedRow = SELECTEDVALUE('Add Rows:'[View by: Fields])
VAR FirstSelectedRow = SELECTCOLUMNS(TOPN(1, VALUES('Add Rows:'[View by: Fields])), "FirstRow", [View by: Fields])
VAR Total = SUMX(VALUES('Add Rows:'[View by: Fields]), [Ext. GP Impact Rate Archive])
VAR Calc =
SWITCH(
TRUE(),
ISINSCOPE(GPH[GPH Level1]), CALCULATE(EQN),
ISINSCOPE(GPH[GPH Level2]), CALCULATE(EQN),
ISINSCOPE(GPH[GPH Level3]), CALCULATE(EQN),
ISINSCOPE(GPH[GPH Level4]), CALCULATE(EQN),
ISINSCOPE(Manufacturer[VENDOR_NAME]), CALCULATE(EQN),
ISINSCOPE(Linebuy[LINEBUY_ID]), CALCULATE(EQN),
ISINSCOPE(Transactions[BUSINESS_GROUP]), CALCULATE(EQN),
ISINSCOPE(Transactions[PE_BRAND_TYPE]), CALCULATE(EQN),
ISINSCOPE(Region[EDMCS_LOB_DESC]), CALCULATE(EQN),
ISINSCOPE(Region[EDMCS_REGION_NAME]), CALCULATE(EQN),
ISINSCOPE(Linebuy[Commodity.Category1]), CALCULATE(EQN),
ISINSCOPE(PS_Type[PS_Type]), CALCULATE(EQN),
ISINSCOPE(Transactions[BUSINESS_GROUP]), CALCULATE(EQN),
ISINSCOPE(Transactions[Commodity Tie Out Product Type]), CALCULATE(EQN),
Total
)
RETURN
Calc