Calculation of Percentage of sales using the From and To Financial Quaters which we getting from Bex Query prompt.

Hi Experts ,

  I am getting the Financial Quarter value as (From and To   ) from Bex Query  mandatory Prompt to the webi report.

Using this I need to calculate the Sales Percentage.

with the formula  Qtr.Sales - Pre.Qtr Sales/Pre.Qtr Sales  for Quarter wise which we are getting as mandatory  prompt values(from and to ) .

The problem is How to get the previous Financial Quarter sales  value  for the"  From : Financial Quarter."of the  Prompt.

Please Help .....

Thanks in Advance..

Regards ,

Nikil.