The increase was primarily the result of increased payroll-related expenses, increased travel and other expenses as business returned to more normal operations in 2021.

Mar 18, 2022 / CFO / receipt, needs a key / John Sullivan, CFO | earnings call 2022-03-18 | transcript 84962e5e-4a0c-4289-8df5-5d11266cf27c | chars 8004-8172 | segment 8

Selling and administrative expenses increased 5% in the first quarter compared to the first quarter of 2020, primarily due to increased amortization expenses related to the HALIC acquisition in the third quarter of 2020, and increased incentive costs, which were suspended in the first quarter of 2020, offset by reduced levels of travel expenses and related payroll expenses.

May 12, 2021 / CFO / receipt, needs a key / John Sullivan, CFO | earnings call 2021-05-12 | transcript 8fa61298-7da4-47d2-8470-53d7c9002968 | chars 6537-6913 | segment 6