Yes, I assigned to each product shipment class, which is the same for all products. The user has an Italian address because the online market when just about Italy. In the shipping area I only selected Italy, both as regards the free delivery, that works, both as regards the fixed cost.
I also noticed that despite having enabled the calculation of the shipment in chekout, but not the shows … and I get this “alert” for some time …
https://s28.postimg.org/cns0xlqb1/img.png
Woocommerce obviously is activated …