Shipment Costs - create a line per shipment ship unit

Summary:

Is it possible to make OTM create in the shipment cost table one line per ship unit instead of one line per shipment(summing values) on some specific cases (rate based?) I tried different rate configurations but in the shipment cost table the system is always summing the results (which I'm able to calculate correctly) in one line per shipment.

This is my case

Shipment A containing Shipment Ship Unit X and Y the cost for Shipment Ship Unit X is 10 and for Shipment Ship Unit Y is 15

Today I'm only able to get a line in shipment cost table = 25 (sum of both ship units)