Hi @Menuiserie du ranch.

Welcome to the Sonos community and thanks for reaching out to us. I understand that you have concerns about your invoice, Let me recommend contacting our sales team through their toll-free number @ +18006802345 option 4. They may have the answer to your inquiry and questions. 

Please let us know if you still have further questions or concerns. I’ll be more than happy to help you out.

Thanks,