"Big Sale. Last Week." suggests that a sale event has already happened, emphasizing the missed opportunity for readers. The phrase "Last week? Why advertise?" indicates confusion or frustration about advertising a past event, which no longer benefits potential customers. The narrator feels excluded and perhaps annoyed by the timing of the promotion.

The statement "They're just rubbing it in" shows a sense of irritation, implying that advertising after the sale feels like a way to remind people of what they missed. Overall, it reflects the common feelings of disappointment and exclusion when community events or sales are promoted after they have ended, resonating with middle school readers experiencing similar frustrations.