Aging Report by sales Person Query

  Customer Aging Report (with Parameter as Sales Person) we have following queries,

 

1.       Customer “X” might have 2 different sales persons (Ex:- 01-Jan-2010 to 31-Mar-2010 Sales person ”A” will handle this customer, Later  if we change sales person as  “B” )  what changes you are expecting from report.

 

2.       If we replace Sales person “B” on behalf of sales person “A” who all ready quit his/her  job, in such a case we need to replace sales person “B” where ever we assigned “A”.

       

       Please explain what is the solution in these kind of scenarios.