Quoting from [tonyinspection]:
Replying to [Resources]: Attach a pro forma invoice sample if possible. Thanks.
Here are my samples
http://www.geek-a-bite.de/xls/import.xls
http://www.geek-a-bite.de/xls/SAMPLE_CI.xls
The CI is almost the same as the PI, just write Proforma Invoice to it
Replying to [detronic]: