In this task, you're given a pair of sentences, sentence 1 and sentence 2. Your job is to determine if the two sentences clearly agree/disagree with each other, or if this can't be determined. Indicate your answer as yes or no respectively.

Sentence 1: While Americans returning home must pay 10% duty on everything above $600 worth of purchases made abroad, the US customs levy added to the price of an item may still come to less than what the purchases would cost in Boston or Chicago. Sentence 2: US customs charges a fee based on purchases made.
yes