How does the PMAC compution perform in circular inter-org transaction?

Dear Experts,

 

Please help to make explanation for this case.

For example there are 02 inventory org O1 and O2 (same organization unit), PMAC of O1 is A and PMAC of O2 is B. Pls noted that A and B are different.

We process an direct inter-org transaction from O1 to O2 then O2 to O1. Then PMAC of O1 and O2 have been updated to A' and B'.

Please help to explain formula to calculate A' and B'.

 

Ps: I attach the test case.

 

Thanks & Best Regards,

 

CONGNC