[MFN] How to manage length items into the MBOM

Hello,

In the EBOM I have a physical product for every length of the same tube (an EIN for each length for example).

So I can have something like this : 

  1. EBOM
    1. TUBE length 1m (EIN XXX-001)
    2. TUBE length 2m (EIN XXX-002)
    3. TUBE length 1,4m (EIN XXX-003)
  2. MBOM
    1. TUBE 6m length reference (quantity = 1m+2m+1,4m)

On the ERP side I have an article code for the TUBE 6m length reference.

What is the best way to handle this case in MFN if I want to know the total length and how many TUBE 6m I need to purchase?

I do not see how to handle it easily at the moment because by default if I drag and drop every tube frome my EBOM I will create the same number of MBOM itemsmfn 

Best regards

Guillaume Wolff