How to: Cells accumulate with each other

[reporting_neu]

Hi,
I have to gradually add up these values, i.e. accumulate them.

Example:

Portion	Accumulate
3,60 %	3,60 %
2,92 %	6,52 %
2,56 %	9,08 %
2,22 %	11,30 %

SUM({$<$(GUI_CAL_PA_SET(Year,0)),V_BelegPos.offen = {'0'}, V_BelegPos.BelegArt = {'R','G'}> } V_BelegPos.pA_Gesamtpreis_HW * V_BelegPos.GS_Faktor * V_BelegPos.ZS_Faktor)
/
SUM(TOTAL{$<$(GUI_CAL_PA_SET(Year,0)),V_BelegPos.offen = {'0'}, V_BelegPos.BelegArt = {'R','G'}> } V_BelegPos.pA_Gesamtpreis_HW * V_BelegPos.GS_Faktor * V_BelegPos.ZS_Faktor)

This is the formula used to calculate the proportion. And with this formula I would have to accumulate.

Can you help me please?