How to update iExpense dff field with a value ?

Hi All,

   We created an Expense Report Line DFF  called "Number of Installment" and "Installment Amount". The business requirement is that, when employee apply for a Loan ( ex : 5000) , he/she will enter the "Number of Installment" field (ex : 6) . Now we want the "Installment Amount" field to be calculated by the system and  updated with the result ( Loan Amount / Number of installment ex : 5000/6= 833.33).

  Can we achieve this with AP_WEB_CUST_DFLEX_PKG package ?

  Any feedback would be greatly appreciated .

Thank You.

  SK