Solution : https://service.sap.com/sap/support/notes/681684 (SAP Service marketplace login required)
Key words : 
price eur 100 / 1 pakyou create, incorrect conversions occur, latest ipc patch, higher support packages, ipc support package 02-04, support package 17, support package 04, 0 support package 11-17, sales unit, condition unit
Related Notes : 
       
| 692393 | Quantity conversions after loading in the IPC not correct | 
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| 486061 | How to get patches for CRM Internet Pricing Configurator |