Report displaying twice as many records

Hi all.

I have a crystal report that has 3 parameters:

1. Prior Period Range
2. Current Period Range
3. Department Number

What this report does is displays the amounts for each G/L account for those periods and for that specifc Department.

There are two group headers:

1. Department Name
2. Expense Break (i.e. wage, supply, travel etc)

Sales Department(Group Header 1)
Wage Expenses (Group Header 2)|

Prior Period:01/01/04-12/31/04 | Current Period:01/01/05-12/31/05

(Detail Section:)
G/L# - Wages $200.00 $0.00 | G/L# - Wages $0.00 $100.00
G/L# - Insurance $0.00 $50.00 | G/L# - Insurance $500.00 $0.00

So I would like for it to keep it at one line, and not create an additional line in the detail line when it is different. In other words:

Prior Period | Current Period

G/L# - Wages $200.00 | $100.00
G/L# - Insurance $500.00 | $50.00

Any suggestions? Thank you in advance.u can make use of the formulas.|||I played with the headers and footers and made it work!|||I played with the headers and footers and made it work!
Can you show the method you used?