Credit memo difference amount

Hi All,

I Have posted one credit memo for an invoice with the invoice value it has posted some difference amount to the difference account that amount also is there in the PO. So I need to clear that difference amount.

Please suggest me how can I clear that difference amount. I think that amount has posted for financial trading account are some thing.

Should I post Manual journal entry for that? If so means how can I post Manual journal entry.

Suggestion would be highly appreciated.

Thanks

Nandha