- Locate and use Accounting forms for Invoice, New Customer, and Detail Code requests. The hold on the student record will remain in effect until the past-due balance and collection fees are paid below the required threshold.You must have an invoice from Wayne. Locate your Customer ID and Personal Identification Number (PIN) to log in, view, and pay invoices. We're going to walk you through how to calculate accounts receivable in this guide. We'll demystify a myriad of different formulas and ratios you need to know. A receivables financing agreement is a type of financial transaction in which a business sells its accounts receivable (invoices) to a third party. First metric:calculate DSO on AR and Actual Billings. Accounts and Notes Receivable. Accounts receivable of the business-type activities consist of utilities receivable.