It isn't just the labor cost but the whole supply chain costs. If the vendors that make the parts are in the same country and close to the assembly plant it cos

It isn't just the labor cost but the whole supply chain costs. If the vendors that make the parts are in the same country and close to the assembly plant it costs less to ship from the vendor and there is less red tape around importation of the parts for assembly. This is one of the big reasons Apple makes almost everything in China.