Dynamic YTD Based On Slicer

Hello,

A bit newer to power BI here. I'm trying to create a measure that calculates YTD based on a slicer. I can't attach the dashboard because of privacy issues, but I will do my best to describe the corresponding tables. 

I have a table called "Revenue" that has the following columns:

     Year

     Month

     Account

     Scenario

     Value

     Month Number (related function with another table)

There is another table called Months that has three columns called month number, month, and date_format (in a proper date format). This table has a relationship with revenue, and drives the related funtion on the other table.

There is a slicer on my dashboard for date_format (months). 

What I'm trying to do is dynamically calculate a YTD revenue based on the month chosen on the slicer, but I can't do it.  Essentially, when "April" is chosen, it should be the sum of all correponding revenue less than or equal to the month number column on my revenue table, but I can't get it to work properly. This measure will be put onto a matrix and organized by "unit", which is another table with a relationship to revenue. Below is the function I've tried to use, but I can't get it to work properly. 

Rev YTD Test = calculate(sum(Revenue_COGS[Value]),filter(all(Revenue_COGS),Revenue_COGS[Scenario]="ACTUAL" & Revenue_COGS[Year] = "2021" & Revenue_COGS[Account] = "Revenue" & Revenue_COGS[Month Number] <= value(selectedvalue(Months[Date_Format].[Month]))))

If anyone could help me that would be amazing, if need be I can send the pbi file with dummy data. 

Thanks in advance.