Beginning with the sequential performance, sales in containerboard decreased 1% in Q1.

Source: https://seekingalpha.com/article/4604008-cascades-inc-cadnf-q1-2023-earnings-call-transcript?source=feed_all_articles

Labor costs and certain indirect costs will increase as some containerboard mill operations were temporarily idled during the fourth quarter.

Source: https://seekingalpha.com/article/4572719-packaging-corporation-of-america-pkg-q4-2022-earnings-call-transcript?source=feed_all_articles

Sales and profitability were impacted by lower containerboard and paper prices and lower volumes for consumer board.

Source: https://seekingalpha.com/article/4644845-stora-enso-oyj-seojf-q3-2023-earnings-call-transcript?source=feed_all_articles