韩国采购需求：邮寄盒、圣诞倒数日历礼品盒、纸板盒制作器、纸箱、瓦楞纸箱设计、纸盒设计

I'm looking to place an order for custom gift boxes featuring my logo. Let's go with rigid cardboard in two colors: black and pink, with gold foil stamping on both. The size should be suitable for my needs, and I'm considering a total of 500 boxes—150 in black and 350 in pink. Could you share the price per unit based on this quantity? I'd also like to know about the sample cost and the lead time for that, plus the overall production time. Don't forget to include shipping costs to Incheon, South Korea. I can provide the logo file in AI or PDF when needed. Thanks!