How to implement Intercompany including Sales Order/Purchase Order between Legal Entities?

Summary:

How to implement Intercompany including Sales Order/Purchase Order between Legal Entities?

Content (required):

We are implementing in a corporate with 2 legal entities: the first we named Manufacturer, and the second we named Trader.

There a case of sale in which the Trader has not stock available and needs buy the stock to Manufacturer to source the demand. In this scenario exists an operation Purchase/Sales between the Trader and Manufacturer respectively.

From this:

- The trader needs a purchase order to control the purchase (agreed prices, 3-way-match, purchase taxes, etc)

- The manufacturer needs a sales order to control the sales (prices, discounts and bonifications, validation for shipments to invoice, sales taxes, etc)