Automatic Order Level Discount in Purchase Order

Hi Experts,

After purchase order creation we need to automatically deduct predefined Percentage from order total without effecting line price.

- As Example:-

             Item Cost = 71.77 L.E in purchase order with the following:-

       1- Discount for xxxx

        2- Disc. forxxxxxxxxx

        3- Discxxxxx

- All the above apply in item cost

- After that we need to apply more discounts with no effect in item cost and we d'not need to impact to financial and display in purchase order header.