Clerk Accounts Payable Question:

You create blanket purchase agreements when you know the detail of goods or services you plan to buy from a specific supplier in a period , but you do not yet know the detail of your delivery schedules. You can use blanket purchase agreements to specify negotiated prices for your items before actually purchasing them.
A Blanket Purchase Agreement is a sort of contract between the you and ur supplier about the price at which you will purchase the items from the supplier in future. Here you enter the price of the item not the quantity of the items. When you create the release you enter the quantity of the items. The price is not updatable in the release. The quantity * price makes the Released Amount. Now suppose your contract with your supplier is such that you can only purchase the items worth a fixed amount against the contract.