Creating Sell shipments with cost as a % of buy shipment base costs

Hi All,

We have a requirement where we need to create sell shipments with costs as a % of buy shipment base cost.

We tired to address this by configuring the sell rate record with condition basis "Shipment cost type"="B" (base) and cost basis as "Buy shipment allocated cost charge amount" = X%.

But the sell shipment is not getting created event after the cost of the buy shipments is allocated.

Please help with pointers/suggestions.

Thank You.

Regards,
Rohan