OS update

https://crm.meblevakimnata.ua/ 1. We are interested in updating on OS, write the cost 2. We have 27 boxed licenses, it's not entirely clear how they will be converted into keys on a new box. Can you describe the cost of using the system in the new environment? 3. What will happen to the information on the old system? (orders/payments/finances/etc etc.) Are there any guarantees that everything will be saved? 4. Is it possible to get a product to test, with the ability to roll back if something doesn't go according to plan or doesn't work properly? PS It is desirable to write answers not here, but if possible by mail - office@meblevakimnata.ua Thank you!