Balance forward in Crystal Report

Question

Hi All Expert,
I have one requirement which will need to bring down the balance forward value in grouping level.
Example:
I have a report design which will group be Date and have three summary total fields (Balance Forward, Current Total, Total Amount)
Date                               Balance Forward                  Current Total                Total Amount
1 Jan                              100                                        100                               200
2 Jan                              200                                        300                               500
3 Jan                              500                                        100                               600
I wish to bring down the total amount from one date to another date on the date grouping level. I tried to use the previous function in Crystal Report formula but it was unable to sum it out.
Appreciated your kind advice how can do this in Crystal Report.
TQ.
Regards,
CK

Answer 1

Hi Carl,
Thanks for your reply. Actually the thread you refering was almost similiar to my problem. In fact, mine problem was not able to bring down the Balance Forward amount in the grouping level.
Let me give you some example. I have 5 fields in my report which are:
Date - Field from database
User - Filed From database
Balance Forward (BF) - Calculation in formula (Previous date CF display as next date BF)
Current Amount (CA)- Field from database
Carry Forward (CF) - Calculation in formula (BF+CA=CF)
When drag out those fields from database into the CR without perform any group, it will shows something as below in the details section.
Date User BF CA CF
1/1   A      0  50  50
1/1   B      0  100  100
2/1   A      50  50 100
2/1   B      100  50 150
When i perform a group on date, it should shows in the design layout as below:
Date BF CA CF
1/1   0  150 150
2/1   150 100 250
On date 1/1, my BF will be 0 for the first day and CF will be 150 with the formula calculation as SUM(BF+CF). For date 2/1, i will required to carry down this 150 (previous date 1/1 CF) down to the date 2/1 BF and following by the next date 3/1.
I try to use the previous(group.fields) in the formula, but it will shows me "No any previous or next value to be retrieve". In fact, i could use the previous(table.fields) function and place on the details section.
Appreciated you could advise how to retrieve my SUM(CF) value and display on the next grouping date section in Crystal Report.
Thanks.
CK