In the latest reporting period of Q3'26, Costco (COST) reported total operating expenses of 6.19B USD. This figure is entirely comprised of SG&A Expenses, as the company consistently reports 0 USD for R&D Expenses across all periods. From Q4'23 to Q3'26, the operating expenses exhibit a recurring seasonal pattern, characterized by significant spikes in every fourth quarter, such as the 7.78B USD recorded in Q4'25. Despite these quarterly fluctuations, the baseline SG&A costs show a gradual upward trajectory, rising from 5.36B USD in Q1'24 to 6.19B USD in Q3'26. The overall trend reflects disciplined expense management where R&D remains non-existent, and administrative costs scale in line with business expansion.