(a) Includes pre-tax charges of $7 million ($6 million after taxes) and $48 million ($37 million after taxes) for the three months ended September 30, 2020 and the twelve months ended December 31, 2020, respectively, for environmental remediation reserve adjustments, a pre-tax charge of $43 million ($33 million after taxes) for the twelve months ended December 31, 2020 for an asbestos litigation reserve adjustment, a pre-tax charge of $14 million ($11 million after taxes) for the twelve months ended December 31, 2020 for the removal of abandoned property at our mills, a net chargeof $11million (before and after taxes) for the twelve months ended December 31, 2020 associated withour investment in India, pre-tax income of $2 million ($1 million after taxes) for the twelve months ended December 31, 2020 for the accrual of a foreign value-added tax refund and a pre-tax charge of $5 million ($4 million after taxes) for the three months and twelve months ended December 31, 2020 for other costs.