In our Project there are some status workflow configured based on tht we need build report ,The rejection rate of integrated issues .

We need to achive based on the formula as below.
The rejection rate of integrated issues is
defined as A / (A+B)
where
A = number of issues with transition
“Reject Fix”
from status “Integrated” to status
“Rejected”
B = number of issues with transition
“Accept Fix”
from status “Integrated” to status
“Verified”
measured over a configurable period of
time.

SO can i get some tips or guidelines to proceed with report? how to proceed this type of complex requirement in JRS reports for customer?or shud we achieve in Advance section?