Please Correct This DAX !

I put them too in Variables which I tried earlier too but it worked this time and not that time.

Still, open for Suggestions...

Previous =
VAR Selected = SWITCH(TRUE(),
ISFILTERED(Data[OrderDate].[Year]),"YEAR",
ISFILTERED(Data[OrderDate].[Quarter]),"QUARTER",
ISFILTERED(Data[OrderDate].[Month]),"MONTH",
ISFILTERED(Data[OrderDate].[Day]),"DAY","Nothing")
VAR YY = CALCULATE(SUM(Data[Total]),DATEADD(Data[OrderDate].[Date],-1,YEAR))
VAR QQ = CALCULATE(SUM(Data[Total]),DATEADD(Data[OrderDate].[Date],-1,QUARTER))
VAR MM = CALCULATE(SUM(Data[Total]),DATEADD(Data[OrderDate].[Date],-1,MONTH))
VAR DD = CALCULATE(SUM(Data[Total]),DATEADD(Data[OrderDate].[Date],-1,DAY))
RETURN
SWITCH(TRUE(),Selected="Year",YY,Selected="Quarter",QQ,Selected="Month",MM,Selected="Day",DD,"")