yes, it is possible. 1 - you create your 3 sale orders (SO) 2 - your SO (after delivery for instance) generate a invoice (and, hence, create accounting journal entries) 3 - you pay your invoices. Here you have different possibilities. This the one I suggest : create a bank statement. From the bank statement, you can register the 2000 payment. Confirm. Finally, go to Accounting / periodical treatement / manual reconcile. Find the journal entries relative to the 3 invoices and the payement, reconcile them all (by selecting the lines and using the 'other action' button.