DTD, MTD and YTD with Date

[#1]

Dear Gurus,

I have some different requirement for DTD, MTD and YTD with Date, attached the data1 file with data and Expected result.
Also attached sample qvw to work on.

Prerequisites:
- User have to ability to change chart from Pivot table to straight table,
So we have to be careful while using Above or below function for Rangesum

Requirements:
- We need accumulative total for MTD and YTD
- We need formula at front end not at script level because in main application we have lot of dimensions

Thanks in advance...

[#2]

Attaching updated Data1 file for more clear infromation

[#3]

Experts help required please

Data:

GBU      Date           Sales
BS      03-Oct-11      450
CD      03-Oct-11      204
BS      04-Oct-11      -2854
CD      04-Oct-11      -95
BS      05-Oct-11      -3608
CD      05-Oct-11      -88
BS      03-Nov-11      225
CD      03-Nov-11      102
BS      04-Nov-11      -1427
CD      04-Nov-11      -47.5
BS      05-Nov-11      -1804
CD      05-Nov-11      -44
     
For Selection     
Date= 05-Nov-2011     
    
Expected Result in pivot
   
Date 05-Nov-2011          
GBU      DTD      MTD      YTD  
BS      -1804      -3006      -9018  
CD      -44           10.5      31.5  
      

For Selection     
Date= 04-Nov-2011, 05-Nov-2011     
      
Expected Result in pivot
    
Date 04-Nov-2011   05-Nov-2011 
GBU      DTD         MTD      YTD       DTD      MTD      YTD
BS         -1427      -1202      -7214       -1804  -3006      -9018
CD           -47.5      54.5      75.5         -44      10.5      31.5

[#4]

Any work around please ...