Just a quick note. Line 15, is clearly for items purchased overseas that now belong to you. The jewelry is not, part of that item. On the goods that you are shipping sea freight, most likely they will have to clear customs upon arrival at first port, this can be done with CBP3299, there is no duty involved, however, most customs broker will charge a clearance fee on your behalf that can range anywhere between $85-$200, the CBP3299 will also need to have copies of the passport for all arriving members, and a detailed description of all items being sent. Please try not to include any food, alcohol, or hazardous item with the sea freight items as that could further delay the clearance process. The CBP6059B is strictly for items purchase overseas, the jewelry is considered personal belongings and no need to declare, I also suggest you have a copy of your shipping documents pertaining to your sea freight belongings to show intent that you are coming back to the US.