Tariffs
Example: A pair of Denim Jeans made in China for Guess Brand. The Chinese manufacturer sells the jeans to Guess Brand for $10 a pair manufactured. Guess sells the jeans at retail in the USA for $100 (a $90 gross profit).
A 50% tariff on China means the jeans cost Guess Brand $15 instead of $10 (an $85 gross profit). A 50% tariff on Guess brand jeans, that retail for $100, changes the cost to the retail brand by $5.