Which of the following permit fees is incorrect?

The residential cost per opening is identified as incorrect because, based on standard fee structures, this amount typically aligns with or exceeds the expected baseline. The fees for residential openings often reflect the complexity and resources required for inspection and approval, and it's common for them to be set higher than what is stated. Understanding the rationale behind these fees is important, as it helps ensure compliance and adequate funding for the regulatory processes involved in plumbing inspections.

In common practice, commercial and industrial openings typically have standardized fees that reflect the nature and scope of their projects, which is why the other options fit more accurately within expected ranges. Institutions may have additional considerations as well, but they are often aligned with residential rates due to building codes and safety standards.