PCBA+PCB company for long term partnership Buyer and Importer

We are a new Brazilian electronic products/machines company and we are searching for the PCBA/PCB suplier in China to build a long term partnership. The Chinese company should produce the PCBs on its own company, not with third parties.Before make PCBA production in higher quantity, we want to make 5 panels the prototypes, of the ZIP file attached, to approve the quality of the PCBs. Tell me, how much will your company charge us to make these prototypes?he Chinese company should produce the PCBs on its own company, not with third parties.Before make PCBA production in higher quantity, we want to make 5 panels the prototypes, of the ZIP file attached, to approve the quality of the PCBs. Tell me, how much will your company charge us to make these prototypes? Show More