SNP/SAP [APO] Plan replenishment between two suppliers ( split 60% / 40% )

Hi all,

Am seeking help in understanding if it possible ( am sure it is :P ) and then how to do it.

I have a SKU that has volume allocated to two suppliers and I need APO to plan to replenish stock as below.

Month 1 - Plan to order from Supplier A 60%

Month 2 - Plan to order from Supplier B 40%

Cycle repeats it self. Please try to navigate me to how to solve this issue. Please note that volume changes as per forecast but amount 60% and 40% does not change.