Accounts Payable is a short term liability of an organization. It's a process by which a company buys goods and services on credit and is billed in the form of an invoice, which states the terms and conditions of the payment. Accounts Payable is recorded as a current liability in the balance sheet. All accounts paayble entries are to be coded under the right G/L accounts to have an accurate picture of the company's short term liability.
For material/Goods Purchases, the Po is required. In the Po, QTY, Product Name, Where is delivery price, Terms and Conditions. In the po there is no matter of final amount. It is just the approximate amount.