What classes and associations would be included in a model that describes the information needed for a

Question:

What classes and associations would be included in a model that describes the information needed for a query that calculates the accounts receivable balance for each customer? Describe differences in the information for the open-invoice method, where customers pay according to specific invoices, versus the balance-forward method, where customers pay balances on monthly statements.

Accounts Receivable
Accounts receivables are debts owed to your company, usually from sales on credit. Accounts receivable is business asset, the sum of the money owed to you by customers who haven’t paid.The standard procedure in business-to-business sales is that...