北美地区采购需求：生物拉链袋，可生物降解袋

I'm interested in ordering custom biodegradable bags with specific features. The bags should be frosted, have a white zipper, and a thickness of 60 microns on each side, with printing on both the front and back. Before placing a larger order, I'd like to receive a sample to evaluate the quality. Could you provide pricing for a sample and the eventual order of 500 pieces? Additionally, I'd like to know your timelines for delivering the sample as well as the larger quantity if everything meets my standards. Thanks!