Latest total value

[Skelkorg]

I'm trying to create a table where I get the latest balance of all accounts, and made the following measure: 

Bal = CALCULATE(SUM('Erp CashBHed'[ClosingBalance]);FILTER('Erp CashBHed';'Erp CashBHed'[ClosingDate]=MAX('Erp CashBHed'[ClosingDate])))

However, when I do that, two (unwanted) things happen:

a) The total for the table is the sum of ClosingBalance for the latest ClosingDate, not the sum ClosingBalance for the latest ClosingDates for each account. All accounts do not necessarily have the same ClosingDate.

b) The data is formatted on an axis graph as well with year and month to show trendline, however if there is no data for that month, it does not show up in the total balance, even though it should use the balance for last month (which is more or less the same issue as a) )

How could I fix it to show what I need?