date difference in correct calculation

Hi Experts,

I am currently working on "0sr_mc02_q0006" delivery delays report in SRM.

Requirement:

To calculate the date difference between "Confirmation date" and "delivery date"

Issue:

This is a standard content report and a standard CKF in place

The date difference is getting calculated in correctly

eg:

PO No       Material    Confirmation date (C3)                    Delivery date(C4)                Confirmed Quantity(C5)               Date difference( C4-C3)

234189      M1            29.12.2013                                   03.01.2014                      1EA                                                                         4

                    M2            29.12.2013                                   03.01.2014                      1EA                                                                          4

                    M3             29.12. 2013                                03.01.2014                       1EA                                                                         4

Issue:

The date difference is getting summated at the query level as 12 days, but the original date difference is 4 days.

Please provide your valuable suggestions.

Regards,

Susheeth