Summarize Measures in a column

Dear all,

I´m having trouble finding a solution to the following:

In my company´s budget, we have "three versions" in the database:

1- Planned: have values for all 12 months

2- Actual: have values "up to date" (let´s assume values until month 5)

3- Forecast: future values to be compared with annual plan and future "actuals".

Problem: in the Forecast version, I need the past months values to be replaced by what actually happened (could have multiple lines, so needs to be a sum).

I tried to make an example below what I need:

Table 1 is what I have. Month 1 to 5 of forecast is not important for me anymore, and needs to be replaced by the sum of "Actual" for each month.

 
The table below is what I´m expecting. Notice that the Forecast values of months 1 to 5 are replaced by the sum of each period that already happened, in version "Actual".

 I do have single measures that work for me, as shown bellow. However, I want to use the Waterfall Chart, and I cannot have different measures. I have to have a single column with different versions, in order to work.

Forecast measure

Forecast = 
CALCULATE(
    SUM('Table1'[Values]);
    FILTER(
        'Table1';
        ('Table1'[Version]; 'Table1'[Month])
            IN { 
                ( "Actual"; 1 ); ( "Actual"; 2 ); ( "Actual"; 3 ); ( "Actual"; 4 ); ( "Actual"; 5 );
                ( "Forecast"; 6 ); ( "Forecast"; 7 ); ( "Forecast"; 8 ); ( "Forecast"; 9 ); ( "Forecast"; 10 ); ( "Forecast"; 11 ); ( "Forecast"; 12 )
            }
    )

Planned measure (similar for Actual)

Planned = 
CALCULATE(
	SUM('Table1'[Values]);
	'Table1'[Version] IN { "Planned" }
)

Thank you for the help!