Dear Sir,
I fully pay the invoice amount US$15.76 for 10 pcs PCB + US$6.50 for freight. Today I get another say additional invoice US$24.63, it is higher than the cost for PCB and freight but without any explanation!!! Please tell me what happen?
![enter image description here][1]
[1]: /editor/20170520/591f19bfabcb8.png