Pivot Table

[upaliwije]

PRODUCT	RETURNS_MAY	Above 25th Day	RETURNS PURCHASED MONTH  JAN	RETURNS PURCHASED MONTH  FEB	RETURNS PURCHASED MONTH  MAR	RETURNS PURCHASED MONTH  APR
A	64,084,661	45,747,412	0
B	60,651,995	47,143,933	0
C	41,744,189	20,974,150	0
D	35,762,223	24,707,734	0
E	24,843,223	16,197,837	0
Total	359,662,112	224,263,911	0

I have above pivot table where 1 st column indicate the product

2 column shows total returns for the month of may

3 column goods returned after 25th of any month

4 ,5,6,7 columns should show the  returns value  in relation to purchased months of goods returned (after 25th day)

My expression  for 2 and 3 columns are as follows

2  column     SUM(RETURNS)

3 COLUMN  =SUM({<R_DAY = {">25"}>} [RETURNS])

R_DAY=Returned day

R_MONTH = Returned Month

P_Month= Purchased Month

above are dates in master calender.

Pls help me to write the expression for the above 4 columns (4,5,6,7)