So, using the 54% ad valorem duty as an example, the import tariff on your $20 dress would be $10.80 – costing you $30.80 in all. Of course, the May 12 modification comes with the usual disclaimer: It ...

That’s one reason why, historically, the same dress might cost more money in a U.S. retail store than it would if you bought it online from an e-commerce company. A case study: Your $20 Shein dress ...

So, using the 54% ad valorem duty as an example, the import tariff on your $20 dress would be $10.80 – costing you $30.80 in all.