Distinction between trade goods (inventory)

Hello,

What actually falls under trade goods and is therefore important for opening and closing inventory?
I sell products for which I buy stickers (labels), boxes, packaging boxes, tape, thank you cards, and for pop-ups, customers receive a paper bag.

Does all this belong to trade goods and therefore inventory? I read contradictory things on the internet / Dexxter.

What if you make purchases of certain items for certain holidays, such as Valentine’s Day, to give as gifts to customers? Does this fall under trade goods or rather marketing (services), etc.?

Thanks