Accumulative SUM Column

Question

Hi, I want to get a sum column with acumulative values from two Fields, for exmple if i select Fiscal_Year_BAL 2018 and Period_BAL 5 i want to get accumulative values from Fiscal_Year_BAL<=2018 and Period_BAL<=5

 

 

Some SELECT Clause or Sentenced to do it?

 

Thanks..