(a)

The three and nine months ended September 30, 2021 include the following:

1.

$4.5 million and $9.4 million, respectively, of charges related to the announced discontinuation of production of uncoated freesheet paper grades on the No. 3 machine at the Jackson, Alabama mill in the first quarter of 2021 associated with the permanent conversion of the machine to produce linerboard and other paper-to-containerboard conversion related activities.

2.

$2.7 million and $0.1 million, respectively, of charges consisting of closure costs related to corrugated products facilities. For the nine months ended September 30, 2021, these costs are partially offset by income primarily consisting of an adjustment of the required asset retirement obligation related to the 2020 closure of the San Lorenzo, California facility, a gain on sale of transportation assets, and insurance proceeds received for a natural disaster at one of the corrugated products facilities.

3.

$0.5 million of costs related to the Company's September 2021 debt refinancing, which included the issuance of the new 3.05% Senior Notes due 2051.

(b)

The three and nine months ended September 30, 2020 include the following:

1.

$3.3 million and $24.1 million of charges, respectively, consisting of closure costs related to corrugated products facilities, substantially all of which relates to the closure of the San Lorenzo, California facility during the second quarter of 2020, partially offset by income related to the sale of a corrugated products facility during the second quarter of 2020.

2.

$10.0 million of charges related to the impact of Hurricane Laura at our DeRidder, Louisiana mill, including unabsorbed costs related to lost production, excess purchased containerboard and freight costs, repair expenses, rental and supplies costs, and other recovery expenses.

(c)

The nine months ended September 20, 2020 include $6.9 million of incremental, out-of-pocket costs related to COVID-19, including supplies, cleaning and sick pay. Beginning in July 2020, all corresponding COVID-19 related expenses were included in normalized costs.

(d)

During the second quarter of 2020, with the exacerbated deterioration in uncoated freesheet market conditions and the estimated impact on our Paper reporting unit arising from the COVID-19 pandemic, as well as projected future results of operations, we identified a triggering event indicating possible impairment of goodwill within our Paper reporting unit. The Company performed an interim quantitative impairment analysis as of May 31, 2020, and, based on the evaluation performed, we determined that goodwill was fully impaired for the Paper reporting unit and recognized a non-cash impairment charge of $55.2 million. See Note 9, Goodwill and Intangible Assets, for additional information.