[Resolved] Showing sum in Crystal Reports group header

[BIGGY]

I have one formula which basically sums up another formula. This gives me the correct numbers. Then I have another formula which I attempt to display the sum and reset the counter. However I would like the sum to show in one of my group headers, but of course if I put the formula into the header, the total only correctly shows in the next group header, so all of the records are off by one. Is there a way in Crystal to make those appear in the header? The formulas are as follows:

This one computes the sum and is located in the group footer:
numbervar SumSales;
SumSales := SumSales + {@MonthlySales};

This one to display which works incorrectly when placed in group header:
whileprintingrecords;
global numbervar SumSales;
numbervar DispSales;

DispSales := SumSales;
SumSales := 0;
DispSales;