print interest calculations on outstanding bills

Dear Experts,
please help me i want to print interest calculations on outstanding bills for the ledgers we set the interest calculation option to yes under the report generated when
Multiple Ledger Printing (M)>> Outstanding(O)>> Ledger(L) >> Group (G) >> sundry debtors.

or else generate a new report for selected group with columns containg
1 Bill date
2 opening amount
3 pending amount
4 interest calculation on the bills for ledgers we set yes to interest calculation bill wise'

Thanks in Advance

 

yes it posible if you gave me "formula for days caluclation between a tansction"