DUCOMMUN INCORPORATED AND SUBSIDIARIES GAAP TO NON-GAAP OPERATING INCOME AND AS A PERCENTAGE OF NET REVENUES RECONCILIATION (Unaudited) (Dollars in thousands) DUCOMMUN INCORPORATED AND SUBSIDIARIES GAAP TO NON-GAAP EARNINGS AND EARNINGS PER SHARE RECONCILIATION (Unaudited) (Dollars in thousands, except per share amounts) (1) Includes tax rate of 20.0% for 2021 adjustments, except for gain on sale-leaseback which utilized the incremental tax rate of 22.4%. (2) Includes tax rate of 16.0% for 2020 adjustments. DUCOMMUN INCORPORATED AND SUBSIDIARIES NON-GAAP BACKLOG* BY REPORTING SEGMENT (Unaudited) (Dollars in thousands) * The Company defines backlog as potential revenue and is based on customer placed purchase orders and long-term agreements ("LTAs") with firm fixed price and expected delivery dates of 24 months or less. Backlog as of as of December 31, 2021 was $905.2 million compared to $807.7 million as of December 31, 2020.