It’s more complicated:

1. Tariff depends on the country of origin of the handbag - simplifying a bit where it was made, not where it was sent from. E.g. if it was made in Vietnam you are paying tariff for Vietnam even when buying from France.
2. Country of origin has to be declared (and sometimes documented) by the seller. Not all of them know how to properly do that.
3. You pay tariffs on full invoice, including shipping costs.
4. If what you are buying is discounted and both full price and discount amount are on the invoice you might initially be forced to pay tariffs on full price and then fight customs to get a partial refund. This usually happens when the seller is sloppy when filing customs paperwork or just includes an invoice and has customs sort it out.
5. There will be extra fees for customs brokerage. IDK what the current rates are with major courier companies, but I’d guess $30-60
6. Once you go over $2500 shipment value it gets more complicated

Source: handled customs for about 40 shipments from Canada and EU to Amazon warehouses in the USA.