Unable to Crack Multiple if Conditions In Qlikview

[QVUser1]

Hi Guys,

Iam Unable to Crack this multiple If Conditions In Qlikview. Could you plz Help this Expression to work out.

If([Scenario 1]='Yes',(Sum(Volume)*S1_Replenish_to_Max_Production_split),
If([Scenario 4]='Yes',(Sum(Volume)*S2_S4_Replenish_to_Reorder_Production_split),
If([Scenario 2]='Yes',(Sum(Volume)*S2_S4_Replenish_to_Reorder_Production_split),
If([Scenario 3]='Yes',
(
Sum(Volume)
-
(SUM({<NumDate=,DayDateWeekID={$(vFutureWEEK1)}>}DemandHL))
+
(SUM({<NumDate=,DayDateWeekID={$(vFutureWeek2)}>}DemandHL)*
(((Sum({<DEMAND_FLAG={'Daily'}>}Min_HL)/SUM({<DEMAND_FLAG={'Daily'}>}ActualDemand))/(Sum({<DEMAND_FLAG={'Daily'}>}Max_HL)/SUM({<DEMAND_FLAG={'Daily'}>}ActualDemand)))))
)*[S3_Replenish_to_Min_Production_split]
,0)
)
)
)

[edwin]

you are using this in a chart rt?  
the expression looks fine.  to figure out whats happening, you may need to attach the QVW