Current year and previous year multi selection

Hello Team,

I have Data table(image).

I have created two measure for Current Year and Previous Year which is working fine.

I am using separate year slicer and separate month slicer

Year slicer: 2019,2020,2021

month Slicer: Jan,Feb,Mar,Apr.....Dec.

Current Year =

Var selectedyear = SELECTEDVALUE('Date table'[Year])

var Result = CALCULATE(SUM(Data[salesamount]),FILTER(Data,AND(Data[year]=selectedyear,data[MonthNumber]<=SELECTEDVALUE('Date table'[Monthnumber]))))

return result

PreviousYear =

Var selectedyear = SELECTEDVALUE('Date table'[Year])

var minyear = MIN(Data[year])

Var Previousyear = SELECTEDVALUE('Date table'[Year])-1

var result = IF(LEN(selectedyear)= 0,CALCULATE(SUM(Data[Salesamount]),FILTER(Data,(Data[year]= minyear))),CALCULATE(SUM(Data[Salesamount]),FILTER(Data,AND(Data[year]=Previousyear ,Data[MonthNumber]<=SELECTEDVALUE('Date table'[MonthNumber])))))

return result

I also used disconnected Date table for this.

If I am using above measure example if I select april 2021 in month slicer data will come for Jan,Feb,Mar,Apr for current year and Jan,feb,mar,Apr data for Previous year (2020)

but if I use multi selection it is not working it is coming as blank.

Users want to use multi selection.

example: if user select Jan and Apr in monthslicer for 2021. They want to see data for only Jan and april 2021.

Same way if we are using above previousyear measure they want to use multi selection.

Currently multi selection option is not working if i use above measure.

Please help me to resolve this issue.