The primary differences in year-over-year operating expenses are higher channel commissions, trade shows, incentive compensation, and recruiting-related costs.

Apr 27, 2023 / CFO / receipt, needs a key / Joel Hatland, CFO | earnings call 2023-04-27 | transcript 83a64a08-151c-4567-87ea-65fe41a4c890 | chars 14087-14246 | segment 13

Also due to COVID-19 limitations, we continued to reduce travel, trade show, and other promotional activities.

Oct 29, 2020 / CFO / receipt, needs a key / Joel Hatland, CFO | earnings call 2020-10-29 | transcript e9350c36-c4a3-4b90-9f0e-f818515c7de9 | chars 9802-9912 | segment 9