Max Year max Month

[Awais-Ashraf]

Hello !

i am facing this issue where id write this expression 

Sum({<[Year]={$(=Max([Year]))},[Month]={$(=Max(Month))}>}[Sales Amount]) 

i get "0" as output but when i write it as 

Sum({<[Year]={$(=Max([Year]))},[Month]={$(=MaxString(Month))}>}[Sales Amount])

i get the desired output but when i want to have the output for Last month and 
Sum({<[Year]={$(=Max([Year]))},[Month]={$(=MaxString(Month)-1)}>}[Sales Amount])

i dont see any output. as we cannot subtract int from String. 
Please Help..
 

[andoryuu]

You should delete this duplicate question when you have the opportunity.