Running Total without gaps

Hi, 

I really hope someone can help. I've been using Dax for a while but I cannot figure out how to make ths work.

I have a running total where I'm getting no data inbetween data points like below;

So it looks like this;

     Jan     Feb     Marc   etc

1     0       1           1  

2     1       0           2

3     0       0           0

4     2       0           0

5     3       2           3

I need it to look like this;

     Jan     Feb     Marc   etc

1     0       1           1  

2     1       1           2

3     1       1           2

4     2       1           2

5     3       2           3

The dax being used is;

Breach Count running total Contract Col =

CALCULATE(

    sum('Breach Month'[Breach Count Col]),

    FILTER(

        ALL('Breach Month'[Breach Month of Contract Col]),'Breach Month'[Breach Month of Contract Col] <=MAX('Breach Month'[Breach Month of Contract Col])

    )

)

For the months across the top of the visual a column is being used in the same table as the rest of the data.

I've tried all the different ways of doing it that i can find in the community but they all do the same thing.

Thanks for your help!!

Al