I have a large job in job cost that I will be receiving payments in the form of draws, many ahead of any invoicing to the customer to secure custom material orders. How can I receive the payment in without an invoice number so that it is reflected in my job billing detail as well as in my integrated AR module? It seems that if I enter it as a prepayment in Cash Receipts, it won't show up in the job cost billing detail and if I do a cash receipt in Job Cost, it will end up showing duplicate payments when I finally apply the payment to the invoice in the Cash Receipts module.