Crystal Reports use report results in other one

Message

     hi 
I need to use report's results to creat a new results in the same report or in new one. 

Could I or not ? 
If yes how? 

e.g 

the result from report 1 is:

user               amount_in                from_user          amount_out     to_user
1                          100                          2                         300               3         
1                          200                          4                         500               4
2                          300                          3                         100               1

I need report use this result to creat the reach the next result:

user                 amount_in                            Amount_out          
1                           300                                        800                  
2                           300                                        100
3                           300                                        300 
4                           500                                        200

please advice me. 

regards,