Variable to be the input for headers

[skychris]

Hi All QS Guru,

I got various hardcoded column   Revenue_Jul22,  Revenue_Aug22,  Revenue_Sep2 etc

try using QS bundle variable input and bring to the measure

'Revenue_' & $(vPrevious)   =>. Displaying it is ok

but when apply with Sum('Revenue_' & $(vPrevious)). it returns me 0

what is the correct syntax for variable embed to field name ?

thank you

[Digvijay_Singh]

May be try as - 

Sum(Revenue_$(vPrevious))