Decide a value of the revenue's AFF of "Intercompany AR trx. by SLA.

Summary:

Decide a value of the revenue's AFF of "Intercompany AR trx. by SLA.

Content (please ensure you mask any confidential information):

Please give us knowledge regarding to Intercompany AR via SFO.

[Scenario]

We have two Business units. (These names are "BU-A" and "BU-B").
"BU-B" has a INV organization. (This name is "INV-B")

1. Create a Sales order on BU-A.
2. The products for sales order is stocked at INV-B.
   So the products are shipped from a INV-B.
3. The following data are created by SFO function.
   (1) Intercompany AP trx. on BU-A.
   (2) Intercompany AR trx. on BU-B.

[Question]
I want to decide a value of the revenue's AFF of "Intercompany AR trx. on BU-B" depending on "Sales order" or "AR trx. for customer on BU-A".