How to add values that are derived from a subreport to values obtained in main report

[Ranjana Kodlekere]

Hi All, I am new to Tibco Jaspersoft. And trying to understand how this works. I have created a main report and a subreport. I need to add the values coming from subreport to main report values. For Example(I am taking a Loan scenario), I have total principal value, total interest value in main report. I have multiple fees values in subreport. I need to addtotal principal value, total interest value andfees values to obtain net receivable value in mainreport. How do I do this Can anyone please help me here.