How bout 25% which is where this would have ended if the Mexicons played hardball.
At 25% either the importer or/and the wholesaler eat it or the retailer says, “no thanks” and buys the shirt elsewhere. Clothing is made in many different countries and all would be anxious get a foot in the door.
Keep in mind that we are the buyer for 80% of everything Mexico exports. Not good business pissing off your biggest customer.