bangkok jewelry wholesale market A platinum necklace bought by Changzhou Golden Store has nothing to bring. I want to change the old and new. I have no invoices. Can I change it? What is the specific cost?

wholesale jewelry displays canada The gold jewelry without the invoice of Changzhou Golden Store (has not been processed and has a clear colors) to change the new, after the old cities weigh 95%off, replace it with a gram of grams, change 20%, and charge 15 yuan/gram at the old city weight. Change the handling fee