Billing for an audit, or other cost-related items, would not be part of an audit scope statement and would instead be handled prior to the actual audit as part of the contract between the organization and auditors.
Reports, exclusions to the scope of the audit, and required certifications on behalf of the systems or auditors are all crucial elements of an audit scope statement.

It is imperative that an application perform checks when each function or portion of the application is accessed, to ensure that the user is properly authorized to access it. Without continual checks each time a function is accessed, an attacker could forge requests to access portions of the application where authorization has not been granted.

The SOC Type 2 audits include five principles: security, privacy, processing integrity, availability, and confidentiality.

Explanation
The ultimate size of the audit report is not something that would ever be included in the audit scope or definition. Decisions about the content of the report should be the only factor that drives the ultimate size of the report. The structure, audience, and format of the audit report are all crucial elements that must be defined and agreed upon as part of the audit scope.