ORG Transfers within same Operating Unit needing to use Transfer Pricing -12.2.5

My Organization has the following situation:

3 OPM Orgs in the same Operating Unit and Legal Entity.  Inventory gets moved between orgs and additional processing operations are performed.

Generate an Internal Requisition

That creates an ISO - the ISO needs to use a selling price (Which will vary one org to the next)

Ship the product.

Inventory is then intransit

Receive ISO back in to inventory in the receiving org - maintain previous org std. cost at the item level.

Do further processing on item and finally sell to the end customer.

At this time we are not sure how to get the accounting through SLA to work correctly.  In the past we've used transfer w/ out pricing and now we need to use transfers w/ pricing.  Does anyone know how we can accomplish this?