In Q1'26, SBUX's operating expenses totaled $638.8M, entirely comprising SG&A expenses, as R&D expenses remained at $0, consistent with the company's business model that does not incur significant research and development costs. This latest figure reflects a modest quarterly decline from $642M in Q4'25. Over the period from Q2'23 to Q1'26, SG&A expenses exhibited a volatile yet generally stable trend, fluctuating between a low of $576M in Q3'24 and a high of $677.2M in Q3'25, with an overall average around $640M per quarter. Notable increases occurred in Q1'24 ($648M) and Q1'25 ($665.8M), potentially driven by operational expansions, while declines in Q3'24 and Q2'25 suggest cost optimization efforts; the absence of R&D across all periods underscores SBUX's focus on sales, general, and administrative functions within its retail operations.