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: Under current conventions the Postal Service sets prices for whole subclasses and cannot select specific customers for surcharges or discounts. Sentence 2: Specific customers cannot be charged differently by the Postal Service.
yes