Variables in sum

[#1]

Hello,

Maybe can someone tell me what i am doing wrong. My task is to calculate sum of previous DrawID starting from today.

Right answer i get when do like this :  sum({$<DrawID = {'<3'} >}[Ticket.Amout] )

I defined  variable vCurrentEdition like this  Num#(if( DrawDate = today() , DrawID),'#.#', '.' , ','),  also tried if( DrawDate = today() , DrawID) both variations gives the right answer 3 .

To count sum i tried this variations:

sum({$<DrawID = {'< $(vCurrentEdition)'} >}[Ticket.Amout] )

sum({$<DrawID = {"< $(vCurrentEdition)"} >}[Ticket.Amout] )

sum({$<DrawID = {'< vCurrentEdition'} >}[Ticket.Amout] )

sum({$<DrawID = {"< vCurrentEdition"} >}[Ticket.Amout] )

sum({$<DrawID = {vCurrentEdition} >}[Ticket.Amout] )

Unfortunately none of them works. What should i do to count sum.

Thanks in advance. 

[#2]

Thanks for suggestion. I tried, but nothing changed.